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 m s⁻¹. The kinetic energy of the other mass is :

Question

Dr. Abubacker · Accepted Answer

[Solution from source] Momentum conservation from rest: 18 × 6 = 12 × v, so v = 9 m/s. KE = ½ × 12 × 81 = 486 J. 243 J is half the correct value. Answer (2).

Q. 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 m s⁻¹. The kinetic energy of the other mass is :

Explanation

Reviewed by Dr. Abubacker

Want to attempt the full paper?