Question

A 1.2 kg ball moving due east at 40 m/s strikes a stationary 6.0 kg object. The 1.2 kg ball rebounds to the west at 25 m/s. What is the speed of the 6.0 kg object after the collision? a.3.0 m/s b.13 m/s c.15 m/s d. 65 m/s​

Answer 1

Answer:

v_2' = v_1 + v_1'

So v_2' = 40 + -25

We have set east to be + and west -

Which gives us 15 m/s. So thats how fast the 6 kg object is going.

This is true for an elastic collision.