NEET 2026, Physics Q10: Gravitational Potential, Potential Energy And Work Done

NEET2026Physics

The amount of work done to raise a mass ‘m’ from the surface of the Earth to a height equal to the radius of the Earth ‘R’, will be :

Solution

Work done in raising a mass to height $h$ against gravity, accounting for the variation of g, is

$W = \frac{m g h}{1 + h / R}$

With $h = R$ ,

$W = \frac{m g R}{1 + 1} = \frac{m g R}{2}$ .

Concept behind this question

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