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JEE Main Physics question

PhysicsWork, Energy and PowerJEE Main

A particle is released from a height S. At a certain height its kinetic energy is three times its potential energy. The height and speed of the particle at that instant are respectively [Kerala PET 2007]

Answer: (D)

Solution

Let the particle fall through (S − x) from the release point, where x is its height above the ground. Then v² = 2g(S−x) and PE at

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Question ID VK-153919