Author Question: A 120-g rubber ball is thrown with a speed of 10 m/s at an oncoming 900-kg car which is approaching ... (Read 82 times)

haleyc112 · **on:** Jul 29, 2018

A 120-g rubber ball is thrown with a speed of 10 m/s at an oncoming 900-kg car which is approaching at 30 m/s, and undergoes a one-dimensional elastic collision with the car. What is the speed of the ball after the collision?

A) 10 m/s
B) 30 m/s
C) 40 m/s
D) 50 m/s
E) 70 m/s

Question 2

The rest mass of a photon is zero kg.

Indicate whether the statement is true or false