defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Work Power and Energy Kinetic Energy
A boy is rolling a 0.5 kg ball on the frictionless floor with the speed of 20 ms-1. The ball gets deflected by an obstacle on the way. After deflection it moves with 5% of its initial kinetic energy. What is the speed of the ball now?
1
1.00 ms-1
2
4.47 ms-1
3
14.41 ms-1
4
19.0 ms-1