Question

A body of mass 1 kg initially at rest explodes into 3 parts in the ratio 1:1:3. The parts of equal masses move perpendicular to each other with 15 m/s.Find the kinetic energy of the heavier fragment

Answer 1

The heavier fragment is about 0.6 kg,the Ke= ½ m v²

Ke=0.5*0.6*15=4.5j