A bomb of mass 30 ~kg at rest explodes into two pieces of masses 18 ~kg and 12 kg . The velocity of 18 ~kg mass is 6 ~ms ⁻¹ . The kinetic energy of the other mass is:

Step-by-step solution

According to law of conservation of conservation of angular moments aligned 30 0 & =18 6+12 V V & =-9 ~m / s aligned Negative sign indicates that both fragments move in opposite direction. aligned K.E. of 12 ~kg & = 1 2 mv ^2 & = 1 2 12 81 & =486 ~J aligned