NEET Physics Question - Gravitation - Gravitational Potential Energy

Rankers Physics

Topic: Gravitation

Subtopic: Gravitational Potential Energy

The work done to raise a mass $m$ from the surface of the earth to a height $h$, which is equal to the radius of the earth, is:

(2019)

$mgR$

$2mgR$

$\frac{1}{2}mgR$

$\frac{3}{2}mgR$

Work done $W = \Delta U = \frac{mgh}{1+h/R}$. Substituting $h = R$, we get $W = \frac{mgR}{1+1} = \frac{1}{2}mgR$.