Question

Assume that before collision the object A has a velocity of 10 m/s with a mass of 8 kg. Object B is at rest and has a mass same with object A. After the collision, Object A stops with a constant mass, but object B moves at a speed of 10 m/s and retained its mass. Identify the type of collision and find the total kinetic energy in joules (J) of the system, before and after collision. 

Answer 1

Type: elastic collision.

$$K_i=K_o=K=0.5mv^2\\K=0.5(8)(10)^2=100\ J$$