PRACTICE QUIZ 9A

Answer the following questions completely and clearly.

1. Name two ways you can maximize an impulse.

 

 

2. Two balls approach each other and collide. Why is it safe to say that the impulses on the balls are equal in magnitude?

 

 

3. Two balls approach each other and collide. Why is it safe to say that the magnitude of the change in momentum for one ball is equal to the magnitude of the change in momentum for the other ball?

 

 

 

Solve the following. Show all work and circle your answer.

4. Mr. Counts is sitting on a park bench reading a physics book when a child's ball rolls toward him across the grass and stops near the bench. He returns the 1.0 kg ball to the child by hitting it with the book. If the impact lasts for 0.4 s and the ball is given a velocity of 20.0 m/s, with what force did the book hit the ball?

 

 

 

5. A shuttle astronaut is sent to repair a defective relay in a 600.0 kg satellite that is traveling in space at 17000.0 m/s away. Suppose the astronaut and his Manned Maneuvering Unit (MMU) have a mass of 400.0 kg and travel at 17010.0 m/s toward the satellite. What is the combined velocity when the astronaut grabs hold of the satellite?