$A$ light body and a heavy body have the same kinetic energy. Which one will have the greater momentum?

The power of a motor pump is $2 \, kW$. How much water per minute can the pump raise to a height of $10 \, m$ (in $kg$)? (Given $g = 10 \, m \, s^{-2}$)

Four men lift a $250 \,kg$ box to a height of $1 \,m$ and hold it without raising or lowering it. $(a)$ How much work is done by the men in lifting the box? $(b)$ How much work do they do in just holding it? $(c)$ Why do they get tired while holding it? $(g = 10 \,m \,s^{-2})$

$A$ person is climbing a palm tree:
$(i)$ What is the work done against the force of gravity?
$(ii)$ What is the work done by the force applied by the person if the person climbs $10 \, m$ and the mass of the person is $45 \, kg$?

How much work should be done on an object of $120 \, kg$ to increase its speed from $25 \, m s^{-1}$ to $40 \, m s^{-1}$ (in $, J$)?

When a force retards the motion of a body,the work done is: