Identify the energy possessed by a rolling stone.

An object of mass $40\, kg$ is raised to a height of $5\, m$ above the ground. What is its potential energy? If the object is allowed to fall,find its kinetic energy when it is half-way down.

$A$ man drops a $10 \, kg$ rock from the top of a $20 \, m$ ladder. What will be its kinetic energy when it reaches the ground? What will be its speed just before it hits the ground? (Take $g = 10 \, m s^{-2}$)

$A$ light and a heavy body have equal kinetic energy. Which one is moving fast?

$A$ body is falling from a height $h$. After it has fallen a height $\frac{h}{2}$,it will possess

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