A ball with a mass of 2 kg moving at a speed of 2 m / s collides with another motionless ball with a mass of 3 kg.

A ball with a mass of 2 kg moving at a speed of 2 m / s collides with another motionless ball with a mass of 3 kg. Determine the speed of the balls after impact if the impact is not elastic.

Given:
m1 = 2kg
m2 = 3kg
v1 = 2 m / s
v2 = 0 m / s
Not elastic
Find: v
Decision:
p = mv
Momentum conservation law
p1 + p2 = p1 ‘+ p2’
m1v1 + m2v2 = (m1 + m2) v
2kg * 2m / s + 3kg * 0m / h = (2kg + 3kg) v
4 kg * m / s = 5 kg * v
v = 0.8 m / s
Answer: v = 0.8m / s.