Physics

We can solve this problem using the conservation of momentum and the fact that in an elastic collision, both momentum and kinetic energy are conserved.

 

Given:

Mass of ball A () = 4 kg

Initial velocity of ball A () = 5 m/s

Final velocity of ball A () = -1 m/s

Mass of ball B () = 6 kg

Initial velocity of ball B () = 0 m/s

Final velocity of ball B () = ? (This is what we need to find)

 

Use the conservation of momentum.

The total momentum before the collision equals the total momentum after the collision: