defence exam Army Havildar SAC Mock Test Series 2025 Physics Center of Mass and Linear Momentum Collisions
A 10 kg ball moving with speed 2 m/s collides head on with another stationary 5 kg ball. If the collision is perfectly inelastic, then the loss in kinetic energy is -
1
20 J
2
54.8 J
3
6.5 J
4
12.3 J