Two identical cars with the same mass were forced to change speed. Which object experiences the strongest force to change speed?

Why do you think letter B is most correct. (use the mass and change of speed to support your answer)

Instructions:

1. Roll Object A toward Object B and observe how the objects change velocity when they collide. Record your observations in the data table

2. For Effect: Object A and Effect: Object B. choose from the following options:

3. speed up, slow down, start moving, stop moving, change direction

4. Based on the velocity changes, infer the direction of the force (if any) acting on each object and record it in the table for Force direction: Object A and Force direction: Object B. Choose from the following options: • left, right, none

5. Repeat these steps for all three collisions.

Lab Reflection Questions:

In test 1-3, what evidence can you find to support why ‘Object B’ has the greatest change in velocity during one of the trials?

CFS:

• accurately identifies the changes to each object in a collision

• accurately describes the relationship between force, mass and velocity in a collision

• accurately identifies the strongest sources of evidence from the experimental data

1. Use the image as an example to set up your objects.

2. Roll Object A toward Object B and observe how the objects change velocity when they collide.

3. Record your observations in the data table for Effect: Object A and Effect: Object

4. Choose from the following options:

5. speed up, slow down, stop moving, change direction

6. Based on the velocity changes, infer the direction of the force (if any) acting on each object and record it in the table for Force direction: Object A and Force direction: Object B. Choose from the following options: • left, right, none

Lab Reflection Questions:

In test 4-5, what evidence can you find to support why ‘Object A’ moved the most after one of the collisions?

CFS:

• accurately identifies the changes to each object in a collision

• accurately describes the relationship between force, mass and velocity in a collision

• accurately identifies the strongest sources of evidence from the experimental data

Describe the direction and strength of force each object would experience during the collision.

CFS:

• accurately identifies the changes to each object in a collision

• accurately describes the relationship between force, mass and velocity in a collision

How does the mass of an object impact the acceleration after a collision?

If the object has more mass it will acceleration ....

If the object has less mass it will acceleration ....

CFS:

• accurately identifies the changes to each object in a collision

• accurately describes the relationship between force, mass and velocity in a collision