Author Question: A 2-kg rifle that is suspended by strings fires a 0.01-kg bullet at 200 m/s. The recoil velocity of ... (Read 67 times)

debasdf · **on:** Jul 29, 2018

A 2-kg rifle that is suspended by strings fires a 0.01-kg bullet at 200 m/s. The recoil velocity of the rifle is about

A) 0.001 m/s.
B) 0.01 m/s.
C) 0.1 m/s.
D) 1 m/s.
E) none of these

Question 2

Two billiard balls having the same mass and speed roll toward each other. What is their combined momentum after they meet?

A) zero
B) half the sum of their original momentums
C) twice the sum of their original momentums
D) need more information