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Difference between Internal Energy and Enthalpy

A body of mas...

Question

A body of mass 4 kg is taken from a height of 5 m to a height 10 m. Find the increase in its potential energy $(g = 10 m / s^{2})$ .

100 J

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200 J

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300 J

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400 J

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Solution

The correct option is C $200 J$
Given, mass of the body, $m = 4 k g$ ;
increase in height of the body, $h = (10 - 5) = 5 m$
Increase in potential energy,
$Δ E_{p} = m g h$

$= (4) \times (10) \times (5) = 200 J$

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