Two bodies A and B of masses $10 \mathrm{kg}$ and $20 \mathrm{kg}$ respectively are at the same height above the ground. Which of the two has greater potential energy ?

A body of mass $\mathrm{m}$ is moved from ground to a height $\mathrm{h}$. If force of gravity on mass of $1 \mathrm{kg}$ is $\mathrm{g}$ newton. Find the force needed to lift the body.

A body of mass $\mathrm{m}$ is moved from ground to a height $\mathrm{h}$. If force of gravity on mass of $1 \mathrm{kg} \mathrm{is} \mathrm{g}$ newton, find the work done in lifting the body.

A body of mass $m$ is moved from ground to a height $h$. If force of gravity on mass of $1 \mathrm{kg}$ is $g$ newton, find the potential energy stored in the body.