NEET 2008 Physics question

Physics Work, Energy and Power NEET 2008

A shell of mass 200 gm is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is

(1)
(2)Correct
(3)
(4)

Answer: (2)

Solution

Let the shell (0.2 kg) move with velocity and the gun (4 kg) recoil with velocity . Momentum is conserved (initially zero): . The energy released appears as kinetic energy: $(0. +

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Question ID VK-089944