Ask iit jee aieee pet cbse icse state board community Discussion Response Post to: calorimetry
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Priyesh (1601)

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no ans should be 3000J


see


initial momentum is  20 * 20 - 10 * 10 = 300kgm/sec


now conserving momentum


30 * V = 300


=> both will move together with 10m/sec


so energy lost = initial energy - final energy = 4500 - 1500 = 3000J


"Imagination is more important than knowledge."
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