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JEE Main Physics question

PhysicsMotion in a Straight LineJEE Main

A stone is dropped from the top of a tall tower. The ratio of the kinetic energy of the stone at the end of three seconds to the increase in the kinetic energy of the stone during the next three seconds is

Answer: (C)

Solution

KE ∝ v² ∝ t² (for free fall from rest). KE(0→3s) ∝ 3² = 9. KE(0→6s) ∝ 6²

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Question ID VK-153740