Question

A 5-kg ball rolling at a speed of 3 m/s strikes a 2-kg ball at rest. The 5-kg ball then comes to a stop and the 2-kg ball begins to roll forward. Determine how fast the 2-kg ball is moving.

Velocity: _ m/s

Answer 1

7.5m/s

Step-by-step explanation:

Law of conservation of momentum: momentum in a system before collision equals to that after collision/

5kg*3m/s=2kg*v

15kgm/s=2kg*v

v=7.5m/s