Gravitational Potential Energy

The potential energy of a body of mass $1 \mathrm{k}\mathrm{g}$ kept at a height of $1 \mathrm{m}$ is $1 \mathrm{J}$.

A body at a height possesses:

If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy_____.

Given that the force of gravity acting on a one $\mathrm{kg}$ mass is $10 \mathrm{N}$, find the gravitational potential energy of a $5 \mathrm{kilogram}$ mass that is situated $30 \mathrm{meters}$ above the earth.

Cotyledons are also called-

Which one of the following statements is not true for the gravitational potential energy?