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PhysicsNEET 2021Kinetic and potential energy, conservation

Work, Energy and Power

A particle is released from height SS from the surface of the Earth. At a certain height its kinetic energy is three times its potential energy. The height from the surface of the earth and the speed of the particle at that instant are respectively:

  1. A.S4, 3gS2\dfrac{S}{4},\ \dfrac{3gS}{2}
  2. B.S4, 3gS2\dfrac{S}{4},\ \dfrac{\sqrt{3gS}}{2}
  3. C.S2, 3gS2\dfrac{S}{2},\ \dfrac{\sqrt{3gS}}{2}
  4. D.S4, 3gS2\dfrac{S}{4},\ \sqrt{\dfrac{3gS}{2}}✓

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