Question

A bomb at rest explodes explodes into two fragments of masses 2kg and 3kg the total kinetic energy of the

Answer 1

zero is the total kinetic energy after exploding.

explanation:-

                          before explosion the mass of the bomb is 2 kg+3 kg = 5 kg. it's velocity is zero. hence the kinetic energy is zero.

                          after explosion the mass has been divided into two parts and their velocities are in opposite direction if we take it's K.E both body's K.E are same in magnitude but opposite in direction. hence we will get zero in magnitude if we add the K.E of both bodies.