defence exam Army Havildar SAC Mock Test Series 2025 Physics Center of Mass and Linear Momentum Collisions
A body of mass 2 kg makes an elastic head-on collision with a second body at rest and continues to move in the original direction but with one-fourth of its original speed. What is the mass of the second body?
1
1.0 kg
2
1.5 kg
3
1.8 kg
4
1.2 kg