Question

A 100 kg mass, initially at rest, is blown apart into two 50.0 kg pieces.
After the blast, the two masses are moving apart with a relative velocity
of 100 m/s. The total kinetic energy after the explosion is

Answer 1

Answer:

Since the center of mass is zero prior to the explosion, it must also be zero after the explosion because no external forces are present,

KE1 = 1/2 (M/2) * 50^2 m2/s^2= 25 * 2500 J = 62,500 J

The total KE will be 2 * 62,500 J = 125,000 J