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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A bullet moving with a speed of 100 ms can just penetrate two planks of equal thickness. Then, the number of such planks penetrated by the same bullet when the speed is doubled will be

Answer: (D)

Solution

Kinetic energy , and the work needed to penetrate is proportional to the number of planks (equal

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Question ID VK-151973