A body is thrown up with a kinetic energy of $100 \mathrm{J}$. Find the potential energy at the topmost point.

A body is thrown up with a kinetic energy of $100 \mathrm{J}$. Find the height attained by the body in this case if the mass of the body is $1 \mathrm{kg}$. (Take $g = 10 \mathrm{m}/{\mathrm{s}}^2$)

What is the difference between $\mathrm{kWh}$ and $\mathrm{kW}$ ?

$1 \mathrm{kWh}=$_____$\times {10}^6 \mathrm{J}$

The commercial unit of energy is _____($\mathrm{J}/ \mathrm{kWh}/ \mathrm{Wh}/ \mathrm{kWs}$).

$1 \mathrm{W} \mathrm{s} =$ _____ $\mathrm{J}$. $$(Choose from $1,10,100$)

Define power. What is its SI unit? Give a relation-ship between power, force, and velocity.