Which of the following graphs shows variation of kinetic energy with speed?

$1 \mathrm{MeV}$ (Mega electron volt) is equal to

A body of mass $5 \mathrm{kg}$ is dropped from a height of $1 \mathrm{m}$. Its kinetic energy just before reaching the ground is _____.

A body is at rest. It may possess

Two bodies of mass $2 \mathrm{g}$and $3 \mathrm{g}$ have equal kinetic energy. Which of the ratios of their momentum given below, is the correct one?

A coolie lifts a suitcase and walks from the platform to an overhead bridge. The work done by the coolie is

$1$ erg = _____Joule.