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Gravtiational PE

A body of mas...

Question

A body of mass 0.2 kg falls from a height of 10m to a height of 6m above the ground. Find the loss in potential energy taking place in the body. [ $g = 10 m s^{- 2}$ ].

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Solution

Given : $m = 0.2 k g, g = 10 m s^{- 2}, h_{1} = 10 m, h^{2} = 6 m$ .
Loss in P.E. $= m g (h_{1} - h_{2})$
$= 0.2 \times 10 \times 10 (10 - 6)$
$= 0.2 \times 10 \times 4 = 8 J$

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