defence exam Army Havildar SAC Mock Test Series 2025 Physics Center of Mass and Linear Momentum Collisions
A ball is moving with a speed of 5 m/s and collides with another ball moving with a speed of 1 m/s in the opposite direction. What will be the speed of the second ball if after the collision the first ball comes to rest and the coefficient of restitution is \( {1\over 3}\)?
1
2 m/s
2
3 m/s
3
4 m/s
4
\( {4 \over 3}\) m/s