A 0.55 kg basketball moving 6.3 m/s to the right collides with a 0.06 kg tennis ball moving 35 m/s to the left. After the collision, the tennis ball is moving
39.5 m/s to the right. What is the velocity of the basketball after the collision?
Assume an elastic collision occurred.
A. 14.4 m/s to the left
B. 14.4 m/s to the right
C. 1.8 m/s to the left
D. 1.8 m/s to the right

Avery hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. the ball rebounds back at essentially the same speed. if the collision with the floor lasts 0.05 s, what is the average force exerted by the floor on the ball?

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.