Question

A ball of mass 0.15 kg is dropped from a height 10 m, strikes the ground and rebounds to the same height. The magnitude of impulse imparted to the ball is (g = 10 m/s²) nearly :

(1) 1.4 kg m/s

(2) 0 kg m/s

(3) 4.2 kg m/s

(4) 2.1 kg m/s.