JEE Main 202117 Mar, Morning shiftPhysicsEasyWork, Energy and Power70× since 2002
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?