Question

A billiard ball moving with a speed of 5 m/s collides with an identical ball, originally at rest
If the ball stops after collision, then the second ball will move forward with a speed of
(A) 10 m/s
(B) 5 m/s
(C) 2.5 ms
(D) 1.0 m/s​

Answer 1

Answer:

5 m/s (B)

energy in any work is always conserved. so the kinetic energy of forst ball will be acquired by 2nd ball. as the first ball stops so 2nd ball will acquire all of its energy and move with a velocity of 5m/s.