What is the relationship between power, force and velocity?

Seema tried to push a heavy rock of $100 \mathrm{kg}$ for $200 \mathrm{s}$ but could not move it. Find the work done by Seema at the end of $200 \mathrm{s}$.

At what speed of a body of mass$1 \mathrm{kg}$  will have a kinetic energy of $1 \mathrm{J}$?

Identify energy possessed by (i) Rolling Stone (ii) Running athlete.

How much work is done by a weight lifter when he holds a weight of $80 \mathrm{kg}$ on his shoulders for two minutes?

A force of $10 \mathrm{N}$ moves a body with a constant speed of $2 \mathrm{m}/\mathrm{s}$. Calculate the power of the body?

A car and a truck are moving with the same velocity of $60 \mathrm{km}/\mathrm{h}$. Which one has more kinetic energy? (Mass of truck $>$ Mass of a car)

What will be the kinetic energy of a body when its mass is made four times and the velocity is doubled?

A body is thrown vertically upwards. Its velocity goes on decreasing. Write the change in kinetic energy when its velocity is zero.