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NEET 2012 Physics question

PhysicsMotion in a Straight LineNEET 2012

A stone is dropped from a height . It hits the ground with a certain momentum . If the same stone is dropped from a height more than the previous height, the momentum when it hits the ground will change by

Answer: (3)

Solution

Speed on reaching the ground is , so momentum . New height of , so $P' =

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Question ID VK-091078