A bomb of mass 15 kg at rest explodes into two pieces of masses 10 kg and 5 kg. The velocity of 10 kg mass is 6 ms–1. The kinetic energy of the other mass is :

524 J 256 J 486 J 360 J

360 J

Kinetic energy : \(K = \frac{P^2}{2m}\) P = 10 kg x 6 m/s = 60 kg m/s ; m = 5 kg K = 360 J