COMEDK · Physics · 7. Center of Mass Momentum and Collision
A bomb of mass 20 kg at rest explodes into two pieces of masses 12 kg and 8 kg . If the velocity of 8 kg mass is \(6 \mathrm{~ms}^{-1}\), then the kinetic energy of the other mass is:
- A 144 J
- B 64 J
- C 96 J
- D 86 J
Answer & Solution
Correct Answer
(C) 96 J
Step-by-step Solution
Detailed explanation
Let \(M = 20\) kg be the mass of the bomb, \(m_1 = 12\) kg, and \(m_2 = 8\) kg be the masses of the two pieces. Let \(v_1\) and \(v_2\) be the velocities of the two pieces respectively. Initially, the bomb is at rest, so the initial momentum is zero. According to the law of…
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