Hi All,
Welcome to week 3. Be sure to be reading Chapters Prologue, 1 and 2 in your textbook. Also, complete the reading guide by next week's quiz. Please visit this link http://phet.colorado.edu/simulations/sims.php?sim=The_Moving_Man interact with the simulation and blog about what you found. Be sure to compare as many types of motion as possible - constant velocity, acceleration, positive and negative motions and directions, for example. Post this by Friday along with your descriptions of our class activities. Be sure to answer your weekly question from the syllabus on the blog.
We will be discussing motion and Newton's Laws, this week.
Have a good week,
Dr. E
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Emily Struck
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Class Activity:
Tuesday, January 26, we did an activity dealing with copters. First, we were given the materials and instructions in order to make the copters. From the pattern given to us, we cut along the solid lines and folded the paper in order to make the “blades.” Once the paper was cut and folded, we were to test the copter to see what would cause it to either turn quickly or slowly. Dropping the copter from a distance of about 2 m above the ground, we counted the number of twists the copter took before hitting the floor. As the copter spiraled down, we counted 4-5 counterclockwise twists. We noted that shortening the blades of the copter would slower the twists.
Thursday:
Thursday, January 28, we began class discussing Newton’s three laws of motion: inertia, acceleration, and the law of action-reaction. We also discussed the importance of friction and the four types: sliding, rolling, fluid, and static friction. After we took notes and solved a couple problems dealing with the force formula, we began “Newton’s Law Activity.” While doing the lab, we investigated how force and motion are related to each other. We were given assorted smalls balls, spherical objects, and straws to do an experiment relating to Newton’s laws. As Newton states in his first law, the motion of the ball remained at rest when there were no forces acting upon it. When you apply a force to a sphere, it will accelerate, slow down, or stop depending on the force. When the sphere was rolling across the table, the ball continued to move at a constant velocity. Since the forces acting upon the ball are proportionate to the mass, the spheres with different masses did not behave differently. After rolling the spheres, we used the straws to blow on the spheres, adding an unbalanced force to its motion.
What is the difference between acceleration and velocity? Critical Reflection
The glossary in our text defines acceleration as the rate at which velocity changes with time. Velocity is defined as a measurement of the speed of an object with specification of its direction of motion. A car experiences acceleration when speeding up, slowing down, or changing direction (turning). This changes the velocity thus changing the acceleration.
Experimenting with the “moving man” on the internet, I enjoyed watching the position, acceleration, and velocity change as I moved the man forward and backward. Although the position did not change much, the acceleration and velocity changed a lot due to the different direction I was moving the man.
Shari Fischbach
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Tuesday
Today in class, after taking a few notes about distance-time graphs and speech-time graphs, we did an activity that helped us learn about the forces acting upon an object that is falling. We cut and folded paper to make “Copters.” After our Copters were finished we tested their motion falling from 2 meters. We found that the Copter would spin downward in a counterclockwise motion, turning 4 to 5 times before hitting the ground. We also found that by shortening the blades of the Copter it would turn more slowly.
Thursday
Today, we started off class by taking some notes about Newton’s laws of motion. We went over the meanings of the laws and how they are applied to real life situations. Then we did an activity that physically showed us each of the laws. Through our activity we could see that spheres of different sizes and masses all are under the same rules of movement. As Newton’s first law states, the spheres remained at rest or remained in motion when no forces were acting on them. The spheres will also roll in a straight line across the table unless acted upon by another force. Because the forces acting upon the spheres were proportionate to their mass, they did not behave differently as they rolled. The friction acting as a force on the spheres caused them to slow down. We also used a straw to blow air at the spheres, adding an unbalanced force to the sphere’s motion.
Explain the difference between velocity and acceleration. Critical Reflection
Velocity is a measurement of the speed of an object with specification as to the direction of motion. Acceleration is a measure of the change in velocity with relationship to time. Acceleration is dependent on velocity. When velocity changes, acceleration changes. So when an object, such as a cycler speeds up, slows down, or turns, they are changing their velocity. This change in velocity of the bicycle means the bicycle is experiencing acceleration.
Reflecting on The Moving Man, I thought it was interesting to be able to see the affects of the man’s movement on the different graphs. While the position graph didn’t change very drastically, both the velocity and acceleration graphs had very definite spikes. The acceleration graph, especially, had a lot of rapid rises and falls. This is because the acceleration changed every time the man sped up or changed direction.
Tuesday:
ReplyDeleteIn class we did a lab dealing with helicopters. We were first given material to make the helicopters: paper, scissors, and a pattern that we needed to follow. We cut and folded the paper to make the helicopters. The goal of the lab was to observe their motion. We would determine how many times the copter could spin from different heights. Our group let ours drop from 2 meters and the copter spun 3 times.
Thursday:
Today in class we started to discuss Newton's Law of Motions. We went over all three laws in class and were given real life scenrios that they would apply to. By applying these laws to real experiences it helped me understand the process better. During lab we were given four different spheres with different masses and different weights. We used these spheres to demenonstrate the three laws. One example was we blew into a straw straight down on the sphere which would be the thrid law- action, reaction.
Explain the difference between velocity and acceleration. Crtical Reflection
Acceleration is the rate in which velocity changes with time. Velocity is the rate of change of position/direction. An example of acceleration would be a driver pushing on the gas pedal when the red light turns green. A car traveling at a constant speed in the same lane with the cruise control would be a constant velocity
Reflecting on the Moving Man, I thought this was interesting. At first I didn't understand it, but the more I looked at the three different graphs the velocity and acceleration had spikes and it all depended on the speed I was moving the man.
Week 3
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Tuesday:
On Tuesday we talked about distance-time graphs and speed-time graphs. Then we made paper copters to see how forces act on falling objects. We dropped our copters from one meter and they rotated four times counterclockwise. If you shorten the blades of the copter it rotates slower and if you you would make the blades longer, it would make the copter rotate faster.
Thursday:
On Thursday we discussed Newton's Laws of Motion and real life applications of each law. We then did a lab where we were given four speheres of different masses and weights. We first tried to move the sphere by blowing on it through a straw and three of the spheres began to roll but the heaviest ball did not move at all.
Critical Reflection: What is the difference between acceleration and velocity?
Velocity is the rate of change of direction and position of an object. Acceleration is the change in velocity divided by change in time. Acceleration is dependant upon velocity.
Moving Man:
The moving man was a fun activity. The man's position did not change much but the were rapid changes in the velocity and acceleration graphs.
Week 3
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Tuesday: We completed a lab involving a homemade paper helicopter. The first part of the lab included cutting and putting together the copter. Then, we were instructed to drop the copter from different heights and count the number of rotations before the copter hit the ground. I dropped the copter from 2 meters and the copter spun three to four times.
Thursday: In class on Thursday, we discussed the importance of repetition in experiments and labs. We also went over material covering Newton's Laws of Motion and did a short lab involving different size and weight spheres. The purpose of the lab was to show the importance of mass in acceleration.
What is the difference between acceleration and velocity? Critical Reflection
Acceleration is the rate of change in velocity over time, while velocity is defined as the rate of change in direction/position over time. When velocity changes, so does acceleration. Thus, acceleration is dependent on velocity.
Moving Man:
The moving man was an interesting activity that demonstrated the man's movement on the three different graphs. I had to restart the activity several times in order to really understand what was going on in each of the graphs. I found that moving the man quickly in either direction really affected the acceleration graph as well, because of the relationship between velocity and acceleration.
Tuesday:
ReplyDeleteIn class we completed a lab with paper helicopters. We cut out the helicopters and dropped them from three different heights: 1, 2, 2.5 meters. Our helicopter spun 2, 2, 3 times respectively.
Thursday:
In class we talked about Newton's laws. We talked about the importance of mass, friction, and acceleration. We then did a lab using different sized balls to show mass and acceleration and how they correlate together.
What is the difference between acceleration and velocity?
Velocity is the rate of change in direction or position over a period of time. Acceleration is the change of velocity over time. For example if a car hits a wall and the person flys out the acceleration of the car stops but the person is still going the same velocity.
Moving Man:
This activity took sometime to figure out and had to do it multiple times. I soon figured out that moving the man was a direct result for the change in velocity and acceleration.
Tuesday:
ReplyDeleteOn this day we did an activity on speed, which was demonstrated through the construction of paper helicopters and dropping those helicopters from various heights. Our group dropped the helicopter from a height of one meter, two meters, and three meters. (The pattern of the helicopter we used was the original one offered.) Our group graphed the results of rotations of the helicopter after running the experiment. We got three rotations for each meter dropped. The group was very constant.
Thursday:
On this day we discussed Newton’s Laws of Motion. We went over all three and discussed them a little bit more in depth by reviewing examples. We then did a lab to demonstrate the three laws. We used spheres of varying weights and size and blew them with a straw across a flat surface, thus demonstrating that every action has a reaction.
Explain the difference between velocity and acceleration:
Velocity is defined as the rate of speed with which something happens and acceleration is defined as an increase of speed of velocity. Acceleration is directly affected by an objects velocity. When the velocity of an object occurs, then so does the acceleration.
The Moving Man
I found this activity very interesting. It was very interesting to see how the change in speed affected the velocity and acceleration graphs so much. The faster I moved the man, the more movement I noticed in the graphs.
Class Activities
ReplyDeleteOn Tuesday, we focused mainly on learning about acceleration. We learned that you find acceleration by dividing the change in velocity by the change in time. We also learned that when graphing acceleration, the line will be curved either upward or downward (up to show positive, down to show negative).
On Thursday, we studied Newton's Laws of motion. We learned that inertia is the tendency of an object to resist changes in velocity. We also learned of the four main types of motion which include sliding, rolling, fluid, and static. To look at these laws in action we did a lab with different sized and weighted balls, and seeing how they react to force. I found it interestion that a heavy small ball and a lighter, but larger ball will roll at the same velocity when an equal amount of force is placed on both balls.
What is the difference between acceleration and velocity?
Acceleration is defined by the change of velocity divided by the chnge of time, while velocity is the rate of change in direction over the time elapsed. Velocity will remain constant unless acceleration occurs, resulting in the velocity either speeding up or slowing down. When a car is driving that is showing velocity, as it enters the interstate the person will press the pedal down to speed up, showing acceleration.
When experimenting with the "Moving Man" the position of him was not able to move around too much, but playing around with the different velocities and accelerations was interesting. I liked seeing the direction of the man move according to velocity.
Samantha Polzin
ReplyDeleteTuesday:
On Tuesday, we discussed speed and acceleration, distance-time graphs and velocity-time graphs and how they relate to physical science. Velocity is the measurment of speed in a given direction and acceleration is a change in that speed or velocity. We practiced some example problems involving the equation speed = distance divided by time as well as as the equation velocity = change in velocity divided by change in time. To demonstrate this discussion, we made paper helicopters and dropped them from various heights, counting the amount of time the copter spun. Our group also used staples at the bottom of the copter to add weight to see what the difference would be. We found that the copter fell faster with more weight and therefore did not have enough distance to make as many turns. Also, when the wings of copter were bent up at more of an angle, there was not as much resistance and the copter fell even faster. This was a great exercise for younger children that will illustrate the concept of speed and acceleration.
Thursday:
On Thursday, we discussed Newton's Laws of Motion and the concept of force. Force is the push or pull that causes a change in motion and can come from gravity, electricity, magnetism, or friction. We learned another equation: acceleration = force divided mass. We also discussed friction and how this affects objects in motion. To demonstrate Newton's Laws, force, and friction, we used four balls that were of different size, mass, and weight and a straw. We used the straw to blow air on the balls to get them to move. When we were not blowing on the them, the balls remained motionless (or they would have if the table was level...in reality, gravity was causing the balls to roll all over the place). The ping-pong ball was the easies to move because it was so light and did not have a lot of mass. When the ping-pong ball was blown on, the ball moved away from the straw at a constant accleration and when we stopped blowing, the ball slowed down due the friction of the table underneath. We decided to blow on the biggest ball, which was also plastic and hollow, at the same time as the ping-pong ball to see which one which faster. The bigger ball did not accelerate as fast because is more resistance due to its larger mass. The friction of the air acted an agent against the bigger ball. Again, this was a fun exercise that really puts the concept of motion in perspective and allows the students to gain that knowledge through hands-on experience.
Explain the difference between velocity and acceleration:
Velocity is the measurement of the speed of an object travelling in a given direction. Acceleration, then, is the measurement of the change in the velocity of an object. This change can be in speed or even in direction.
The Moving Man:
This activity was extremely interesting. I have used interactive simulations before, but not really like this. It was great to be able to see all three graphs working at the same time to see how speed, direction, and acceleration all relate to each other. It was a little hard to do on a laptop for me just because my motions weren't steady, but it still got the point across. After playing around with it for awhile, I found that when I moved the man very quickly back and forth, the hills and valleys in all three graphs were very very close together because the direction was changeing so fast.
Erica Kline
ReplyDeleteWeek 3
Tuesday: On Tuesday we took a couple notes and then did a class activity involving helicopters. We first started out with scissors, construction paper, and a pattern. We used the pattern to make our helicopter and cut along the solid lines and folded along the dotted lines, which ended up making our helicopter. Our group then went out into the hallway and dropped the helicopter at different heights to see how many times it spun around. We found that with each meter we dropped it at, it spun around 4-5 times, always counterclockwise. Therefore, when we dropped it from 2 meters, it spun around 8-10 times and so on.
Thursday: On Thursday we took some notes and discussed Newtons Laws of Motion. We discussed each of the laws and were given real-life scenereos to make us have a better understand about each law. After discussing each law, we then took a look at the four different types of friction: sliding, rolling, fluid and static. After taking the notes and doing a couple problems from the powerpoint, we did an in-class activity to help us understand the laws better. It involved 4 different spheres of different weight and size. We then blew each ball across the table to understand that for ever action, there is a reaction. We also learned that friction takes a roll in this activity, by making the balls slow down after accelerating.
What is the difference between acceleration and velocity?
Velocity is the rate of change in direction or position of an object. Acceleration is then defined as the change of velocity diveded by the change of time, meaning that when velocity changes, so does the acceleration.
When I took part in the "Moving Man" experiment, it took me awhile to figure out exactly what we were supposed to do, but after toying around with it for awhile, I found it pretty interesting. The position, acceleration and velocity of the man changed as I would move the man around, making the graphs appear, which I thought was pretty cool.
On Tuesday we did a project with taking paper, cutting it out and folding it in certain ways. We did this to see the differences in how our groups pieces fell. We focused on one of the pieces falling from different height. The two different heights were one and two meters. The number of times the piece would spin was right around double (from 1 to 2 meters). After that, one person in our group placed some staples on their piece and another put some on hers too, by not as many. As was predicted the one with more staples spun at a faster speed and hit the ground faster.
ReplyDeleteOn Thursday we did a project with straws, balls, air, and friction. There were different sized and weighted balls, we used the straws to blow on them and try and move them. The ball that was heavy and made of steal, we were unable to move at all; where as the other balls were easily able to be blown across the table. It seemed with the larger ball, slowed down at a faster speed. We figured this happened because the larger ball had more are for the friction to slow it down.
Reflection:
Acceleration is the rate of change in velocity as a function of time. An example of acceleration would be an object from a complete stop increasing its speed or take a toy ball and roll it across the table. There would acceleration from the stationary ball to when it was moving. Velocity is the rate and change of motion. An example of velocity would be if we were in space and you took that same ball and there it, then the ball would keep going at a constant velocity.
The running man website was kind of neat because it allowed you to move the man while seeing how position, velocity, and acceleration can be changed. I just thought it was neat to get to physically play around with it.
Tuesday: We did some notes on speech time graphs and also on distance time graphs. After we got done with talking about these two graphs we did a lab that involved these. The Copters we made were simple copters that we mad out of paper that could folded to in shapes to make the copter rotate in air. We had to see how many rotations our copter could go from our desired distance. After many attempts we found that our copter would only do a couple of rotations. But after we shortened the blades the copter doubled in rotation.
ReplyDeleteOn Thursday we started with talking about Newton’s law of motion. We then talked about these laws and put them into real life situation which made the class more interesting because you could see how these are applied. We then did a lab experiment with different sized balls and weight of balls. This experiment lead to show us that different weighted balls require more velocity to get started and the balls also travel at different speeds. The balls with more friction or more weight didn’t travel as far as one with less friction. The law that was used many times in this experiment was a object is in motion and stays in motion unless acted on an outside force.
Explain the difference between acceleration and velocity
Acceleration is the rate at which velocity changes, which means that acceleration tells you how fast the velocity is changing.
Meaning acceleration tells you that the velocity is changing quickly - a small acceleration tells you that the velocity is changing slowly - an acceleration of zero tells you that the velocity is not changing at all.
Acceleration tells you how the velocity changes - it doesn't tell how how much the velocity is! An object can have a large velocity and a small (or zero) acceleration - and vice versa.
With the moving man exercise I thought this was very interesting. You could definitely see where the position of the man change with the velocity and also the acceleration. The more acceleration that you had on the man the more velocity you saw change too. This was a great way of seeing the effects of velocity and also acceleration.
Tuesday:
ReplyDeleteToday, we cut out patterns from a sheet of paper to make helicopters. We had to figure out the correct way to fold them to make them fall in a spiral direction. We held our helicopters at two feet and watched them spiral. They twisted five times. We cut the blades down a bit to experiment, which made them slow down while spinning.
Thursday:
Today we began our discussion on Newton's Laws of Motion. We took notes from the powerpoint, and then did an experiment. We took a straw and blew air on four different size and weighted balls to see which ones would move easier than others. This demonstrated Newton's laws and how they apply to real life.
What is the difference between velocity and acceleration?
Velocity is the rate of change in direction or position of an object, while acceleration is the change of velocity.
The moving man simulation was pretty neat, because when you move the man on top, the graphs along the bottom showed how his position, velocity and acceleration all related to one another.
Tuesday January 26 we did a copter project. First we had to read over the lab so we understood what we were doing. Once that was done we had to cut out our copters. Once we had the copter cut out we had to see how well they would fly. The copters flew very nice it was hard at first to make the copter fly. I had to make sure that the flaps were folded correctly. Once it started to fly my group did different things like adding staples, tape, and color to the copters. This made a difference in how the copters flew.
ReplyDeleteThursday January 28 we began class by talking about Newton’s laws of motion. Once we were done discussing Newton’s laws. We then started a lab. In this lab we had to blow different balls across the tables. This showed how we could teach Newton’s laws to children so that they understand it. This also shows how science can be fun. That is what will make the children want to learn.
What is the difference between acceleration and velocity? Critical Reflection
Velocity is the rate of change in a direction or position over time. Acceleration is the rate of change in velocity over time. When one changes so does the other one. They depend on each other.
Walking Man
The walking man activity was something that I did not understand at first. After awhile I started to see how the direction and speed would make a difference in the ways the graphs would come out.
In Tuesday's class we discussed curves on distance-time graphs that shows acceleration and then we had to graph out some exapmles. We also did distance-time graphs for constant speed and graphed those. In these graphs the constant speeds are horizontal lines, if the speed decreases the lines slant down and if the speed increases the lines slant upwards. We also got a formula so we can find acceleration. We then did a lab experiment involving paper copters. We dropped the copter from 2 meters and with the long blades the copter spun faster. It spun approximately 4 times in a counter clockwise rotation and then when we shortened the blades it spun slower.
ReplyDeleteThursday: We started Newton's laws of motion. There are three lwas that explain objects in motion, force and opposite reactions. The formula for force is F=ma. We also learned about inertia and the four main types of friction. Our project for the day was a Newton's Law activity. In our activity we had to apply Newton's laws to blowing air through a straw to try to moves different sized balls with different weights to see which would move easier and we had to answer questions about the motion and velocity and acceleration.
The difference between velocity and acceleration? Acceleration is the rate at which velocity changes with time and the change in velocity may be in magnitude, direction, or both. Velocity is the speed of an object with specification of its direction of motion.
The moving man simulation was fun. With the postion it showed of he was moving in a positive or a negative direction and with the velocity and acceleration it showed the different speeds and how the man moved.
Tuesday- We talked about speed and distance graphs. During the lab we made helicopters out of paper and seen how many times they spun while they were falling. After we did this a couple times we altered out helicopter by cutting the fins a little smaller and this made the copter spin about double the times.
ReplyDeleteThursday- We talked about Newton's 3 laws of motion. We did a lab by taking different balls with different masses and velocity's and blowing on them with a straw to see how far they would move.
Acceleration is a change in velocity or speed and/or a change in direction.
Velocity is the speed a object with specification of its direction of motion.
Tuesday in class we started off by taking notes on distance time graphs and speech time graphs. We used paper "Copters" to testtheir motion. We dropped them and saw that they spun 4 to 5 times in a counter clockwise direction. We also discovered that heavier paper made less turns and cutting the blades made it drop slower.
ReplyDeleteThursday in class we learned Newton's 3 laws of motion and how to apply them in real life situations. We did a lab with different size spheres to learn about velocity and acceleration. We rolled the spheres then blew on them to see that mass affects its motion because of Newton's 3 law.
Acceleration is the rate at which velocity changes with time. Velocity is a measurement of the speed of an object with specification of its direction of motion. They are dependent on each other so if one changes it causes the other to change as well.
The moving man simulation showed movement in both positive and negative direction and it showed different speeds, demonstrating acceleration and velocity and how they relate and depend on each other.
In Tuesday's class we did an activity with paper helicopters and the difference in spinning motions from different heights. When doing our experiment, we decided to start from one meter up and move up one meter at a time. At one meter, our copter spun around three times and for every meter we moved up in height, the copter spun three more times. It was interesting to see the difference between height and acceleration of the spins.
ReplyDeleteIn Thursday's class we did an experiment with four balls of different size and weight. We had to see the difficulty of blowing the balls with a straw and the difference between them. We found that the metal ball was more difficult to move than the others, and the ping pong ball was really easy to blow.
The moving man simulation was really interesting. It was cool to see the positive and negative direction and speeds and it was awesome to see the acceleration and velocity and how the coorelate with each other.
Tuesday in class, we did a lab by cutting paper to make a copter with just a few cuts. It was interesting to see how it changed it so much by heavier paper and the differnt lengths of the wings. It helped us to more fully understand speed and distance graphs.
ReplyDeleteThursday in class we did an experiment with two balls of differnt weights and a straw. The object was to push the balls by blowing through the straw. It was intersting to see how roughly the same weight but larger volume would change the force needed to push it. The metal ball was the hardest to move by blowing, and we could not get it to move.
The moving man simulation was very interesting. It was cool to see the graphs oh him moving a positive and negative amount. Sometimes these concepts can be hard to fully understand, so it was good to see it through a visual. It was fun that you could change his position to whatever you wanted.
Tuesday:
ReplyDeleteWe did a lab with Copters. This lab showed the way that distance, weight of paper and length of wings can affect the amount of times that Copter spins. In our group we tried two different weights of paper and dropped the copters from one and two meters. We found that the lighter the paper and the shorter the wings the more times the Copter will spin. This happens because the the copter has more itme in the air the lighter it is and the shorter wings allow the copter to have a tighter spin.
Thursday:
In class we talked velocity and the effect that weight anf friction has on the travel of an object. We tested this with four different weights of balls. We found out that weight and friction both effect the movement. We could not move the heavy ball with only the force of air through the straw. WE also found that a lighter ball will roll for a longer time. It was interesting to see how a simple experiment could show a concept that is many times hard for students to understand.
Difference between Acceleration and Velocity:
Acceleration is the change in velocity and direction. Velocity is the speed of and object in one direction. Without velocity there is no acceleration.
Moving Man:
This demonstraion used three graphs to show acceleration and velocity. The moving man is supposed to be me and it took a while for me to figure it out. Once I understood it I thought it was very interesting.
Week 3
ReplyDeleteOn tuesday we discussed distance/time graphs and speed/time graphs. Then we did an experiment using paper made copters and we experimented their spinning motion depending on height, wing length and weight. Personally I think that the experiment would have been more effective with heavier paper to make the copter.
On thursday we discussed Newton's Three Laws. Then we did an experiment to experience Newton's laws first hand. We used four different weight balls and blew them with straws. We found that weight and friction effect the ball's movement. This helped me understand Newton's laws more clearly.
The difference between acceleration and velcity: Acceleration is the change in velocity; that being fast or slower. Velocity is the speed of an object plus the direction that object is moving.
The Moving Man: This is a simulation that shows a moving man and how he moves depending on acceleration and velocity. It was very difficult for me to understand. I could use an explanation while using the simulation.