Air Track a Virtual Lab - NTD



“ιρ Τραχκ α ςιρτυαλ Λαβ

Please go to one of the following web sites: or

This series of computer simulations allows you (the user) to simulate collisions. To run the simulations select one of the scenarios in the drop down menu and hit "Go". Press "Stop" at any time to pause the simulation. Pressing, "Go" will restart it at that point. To create your own simulation, choose that option from the drop down menu, and two windows will appear that will allow you to edit the carts' properties.    You may also edit their initial velocities and masses in the appropriate fields at the top, drag the carts to any position on the track, and edit "alpha". "Alpha"(() is a measure of the elasticity of a collision. (= 1 for an elastic collision and (=0 for an inelastic collision.

Inelastic Collision #1 (( = 0) Record the initial velocity and mass of both moving objects. Calculate the momentum of both objects or open the momentum window in the upper right corner of the screen. Using the mass and velocity values given for both the red and blue object, press the "Go" button.  Complete the data table below.

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

Inelastic Collision #2: Set the mass of the red object to 2 kg. Do not change the other

quantities. Record the initial and final values in the table below.

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

1. Describe the results of an inelastic collision.

2. Describe the difference between the first and second collision.

3. Is momentum conserved in both collisions?

4. Is Energy conserved in both collisions?

Inelastic Collision #3 : Place the blue cart with its left edge at the 80 cm mark on the air track. Set its velocity to 0.0 m/s and mass of 2 kg. Set the red cart velocity to +10 m/s with a mass of 2 kg. Press the Go button. Record the data in the table below.

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

Inelastic Collision #4 : Set the mass of the red cart to 3 kg and its velocity to +1 m/s. Set the blue carts mass to 1.5 kg. Place the red cart's right-edge at the 10 cm mark and place the blue cart’s left-edge at the 70 cm mark. Adjust the velocity of the blue cart to produce a collision that causes both carts to be at rest after the collision. Complete the table below and be sure to perform the collision and record the position where the two carts make contact. (Hint: Use the pause button to stop motion an instant before the collision).

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

5. Where is the impact point in cm from the left edge ? ___cm

Elastic Collision #1: ((( = 1)

|Red Mass |Red Velocity |Blue Mass |Blue Velocity |

|1 |+100 m/s |1 |0.0 m/s |

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

6. What is the relationship between the initial and final momentums?

7. Describe the motion of the red and blue cart before and after the collision?

 

Elastic Collision #2: ((( = 1)

|Red Mass |Red Velocity |Blue Mass |Blue Velocity |

|3 |+100 m/s |1 |0.0 m/s |

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

8. What is the relationship between the initial and final momentums?

 

9. Describe the motion of the red and blue cart before and after the collision?

10. What is the nature of an elastic collision?

 

Elastic Collision #3: ((( = 1) Position the red cart at the 40 cm mark and the blue cart at the 60 cm mark. Note the location point of impact when the collision occurs.

|Red Mass |Red Velocity |Blue Mass |Blue Velocity |

|1 |+100 m/s |1 |-100.0 m/s |

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

11. Where was the point of impact? _________ cm

Elastic Collision #4: ((( = 1) Position the red cart at the 40 cm mark and the blue cart at the 60 cm mark. Note the location point of impact when the collision occurs.

|Red Mass |Red Velocity |Blue Mass |Blue Velocity |

|3 |+100 m/s |1 |-100.0 m/s |

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

12. Where was the point of impact? _________ cm

Elastic Collision #4: ((( = 1) Position the red cart at the 20 cm mark and the blue cart at the 80 cm mark. Note the location point of impact when the collision occurs.

|Red Mass |Red Velocity |Blue Mass |Blue Velocity |

|3 |+100 m/s |1 |-50.0 m/s |

|Quantity |Red Cart |Blue Cart |

|Mass |  |  |

|Initial Velocity |  |  |

|Initial Momentum |  |  |

|Final Velocity |  |  |

|Final Momentum |  |  |

|Kinetic Energy Initial | | |

|Kinetic Energy Final | | |

|( Kinetic Energy | |  |

13. Where was the point of impact? _________ cm

 

Go to one of the following web sites or

1. Click on the yellow title to begin

2. Click on the [pic] button to learn how to run the simulation

3. Experiment with various settings. State which settings result in the “wreckage” path farthest to the east and explain why.

Summary: Describe the main ideas learned in this activity regarding initial and final total momentum in elastic collisions.

When Finished e-mail to Hr1: Mr.B.

Hr. 4: Mr. B.

Hr. 6: Mr. B.

Hr. 7: Mr. B.

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download