A ball moving with velocity 2 m/s collides head on with another stationary ball of double the mass. If the coefficient of restitution is 0.5 then their velocities (in m/s) after collision will be
Answer & explanation
Correct answer: option 2
m x 2 = m x v1 + 2mv2
2 = v1 + 2v2
0.5 x 2 = v2 - v1
v2 = 1, v1 = 0