Motions Lab
Lab: Interpreting and Matching
Displacement vs. Time Motion Graphs
Objectives:
Materials:
TI-84 Calculator-Based Lab Unit (CBL-II)
Motion detector
Meter stick
Computer with LoggerPro software
Procedure:
Part I –
1. Develop a position vs. time story that describes a body in motion incorporating at least the following four types of motion.
i. standing still
ii. moving with constant velocity
iii. moving with variable negative velocity
iv. moving with variable positive velocity
2. Illustrate the story on a position vs. time graph. Use a legend to cross reference sections of the graph with the corresponding sections of the story.
3. Underneath the graph, write instructions for moving in front of the motion detector according to the graph you have drawn (see page 2 for example).
Part II – AT THE LAB STATION IN CLASS WITH A PARTNER
4. Measure out and mark meaningful locations on the floor and practice the motion needed to create the position vs. time graph.
5. Now it’s time for you to match your physical motion to your group’s descriptive motion graph. You have 3 attempts to match it as best you can. Save a copy best graph your motion creates and reproduce this graph using LoggerPro.
Data:
0 0.162708
0.25 0.331524
0.5 0.793826
0.75 1.01234
1 1.11619
1.25 1.16228
1.5 1.18782
1.75 1.19393
2 1.19532
2.25 1.19726
2.5 1.19699
2.75 1.19865
3 1.20171
3.25 1.2042
3.5 1.20004
3.75 1.19643
4 1.20087
4.25 1.20559
4.5 1.20754
4.75 1.2067
5 1.20254
5.25 1.14423
5.5 1.0701
5.75 0.970139
6 0.892394
6.25 1.11758
6.5 1.71815
6.75 2.23
7 4
Story:
1) Dr. Egor is driving to school one day. He drives 300 meters from his house in one minute when he stops to help a stoner who caught his house on fire.
2) It takes him ten minutes to put out the fire.
3) After, he leaves the house and his car runs away so he chases it 20 meters down the road back the way he came for three minutes.
4) Finally he gives up on chasing the car and finds a magical unicorn on the side of the road. He gets on the back of the unicorn and speeds off to school 500 meters away. It takes him only two minutes.
Illustrated Graph:
Seems graphs do not show up. Click below for graphs.
Directions:
1) Start standing as close to the motion detector as possible and move backwards half a meter for half a second and come to a stop.
2) Stay still for five seconds.
3) Move toward the motion detector slowly at a constant speed for one second.
4) Without stopping move away from the motion detector with positive acceleration.
Motion Detector Graph:
Seems graphs do not show up. Click below for graphs.
Data Analysis: Discuss differences between the descriptive graph and the graph generated by the motion detector. What are the reasons for the differences?
The main difference is that the motion detector graph doesn’t have perfect curves because the graph created with the motion detector is very sensitive and it is difficult to recreate a scenario on such a smaller scale with just a person’s body.
Conclusion: Develop a conclusion that addresses the objectives of the lab.
My conclusion is that it is possible to completely recreate a scenario with a motion detector. My group learned how to use a motion detector and are now familiar with the equipment. The concepts of velocity, acceleration, and displacement are now much clearer.
Displacement vs. Time Motion Graphs
Objectives:
- Create a Displacement vs. Time graph and match your graph with actual motion.
- Gain competence in the use of motion detector and related equipment.
- Understand the relationship between position vs. time, velocity and acceleration.
Materials:
TI-84 Calculator-Based Lab Unit (CBL-II)
Motion detector
Meter stick
Computer with LoggerPro software
Procedure:
Part I –
1. Develop a position vs. time story that describes a body in motion incorporating at least the following four types of motion.
i. standing still
ii. moving with constant velocity
iii. moving with variable negative velocity
iv. moving with variable positive velocity
2. Illustrate the story on a position vs. time graph. Use a legend to cross reference sections of the graph with the corresponding sections of the story.
3. Underneath the graph, write instructions for moving in front of the motion detector according to the graph you have drawn (see page 2 for example).
Part II – AT THE LAB STATION IN CLASS WITH A PARTNER
4. Measure out and mark meaningful locations on the floor and practice the motion needed to create the position vs. time graph.
5. Now it’s time for you to match your physical motion to your group’s descriptive motion graph. You have 3 attempts to match it as best you can. Save a copy best graph your motion creates and reproduce this graph using LoggerPro.
Data:
0 0.162708
0.25 0.331524
0.5 0.793826
0.75 1.01234
1 1.11619
1.25 1.16228
1.5 1.18782
1.75 1.19393
2 1.19532
2.25 1.19726
2.5 1.19699
2.75 1.19865
3 1.20171
3.25 1.2042
3.5 1.20004
3.75 1.19643
4 1.20087
4.25 1.20559
4.5 1.20754
4.75 1.2067
5 1.20254
5.25 1.14423
5.5 1.0701
5.75 0.970139
6 0.892394
6.25 1.11758
6.5 1.71815
6.75 2.23
7 4
Story:
1) Dr. Egor is driving to school one day. He drives 300 meters from his house in one minute when he stops to help a stoner who caught his house on fire.
2) It takes him ten minutes to put out the fire.
3) After, he leaves the house and his car runs away so he chases it 20 meters down the road back the way he came for three minutes.
4) Finally he gives up on chasing the car and finds a magical unicorn on the side of the road. He gets on the back of the unicorn and speeds off to school 500 meters away. It takes him only two minutes.
Illustrated Graph:
Seems graphs do not show up. Click below for graphs.
Directions:
1) Start standing as close to the motion detector as possible and move backwards half a meter for half a second and come to a stop.
2) Stay still for five seconds.
3) Move toward the motion detector slowly at a constant speed for one second.
4) Without stopping move away from the motion detector with positive acceleration.
Motion Detector Graph:
Seems graphs do not show up. Click below for graphs.
Data Analysis: Discuss differences between the descriptive graph and the graph generated by the motion detector. What are the reasons for the differences?
The main difference is that the motion detector graph doesn’t have perfect curves because the graph created with the motion detector is very sensitive and it is difficult to recreate a scenario on such a smaller scale with just a person’s body.
Conclusion: Develop a conclusion that addresses the objectives of the lab.
My conclusion is that it is possible to completely recreate a scenario with a motion detector. My group learned how to use a motion detector and are now familiar with the equipment. The concepts of velocity, acceleration, and displacement are now much clearer.
| motion_lab.doc |
