A body of mass 1kg moving with the velocity of 3kg collided in elastically with stationary body of mass 2kg .after collision the body of 1kg is stationary.how much energy was converted in sound and speed.
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Answer:
2.25joules
Explanation:
∑mv before = ∑mv after
1x3 + 2x0 = 1x0 + 2v
2v = 3
v = 1.5m/s
energy = ∑ 1/2 mv² = 2(1.5)²/2 = 1.5² = 2.25joules
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