A stone is released from rest at the top of a high cliff

PHYSICS · Single correct · CBSE · Physics · Work and Energy · Work and Energy

Problem

A

2\,\text{kg}

stone is released from rest at the top of a

40\,\text{m}

high cliff. Neglecting air resistance, at what height above the ground is its kinetic energy three times its potential energy? (Take

g = 9.8\,\text{m/s}^2

.) (a)

20\,\text{m}

(b)

10\,\text{m}

(c)

30\,\text{m}

(d)

13\,\text{m}

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