Work and Energy...

The velocity of a bus, moving on a smooth road, is increased from 8 m/s to 32 m/s in 120s. During this process, the potential energy of the bus

Two bodies P and Q of equal masses are kept at heights $$x$$ and $$4x$$ respectively. What will be the ratio of their potential energies?

An object of mass 500 g falls from a height of 2m. If $${g = 9.8 m/s^2}$$, what is its kinetic energy just before touching the ground?

What is the mass of a man if he does $$3600\ J$$ of work in climbing a tree $$6\ m$$ tall? $$({g = 10 m/s^2})$$

When a stone falls freely towards the earth, its total energy ?

A girl weighing 50 kg makes a high jump of 1.2 m.What is her kinetic energy at the highest point? $${(g= 10 ms^{-2}}$$)

A car is being driven at a constant speed of $$5\ m/s$$  by a force of $${3\times 10^8}\ N$$. It takes $$2$$ minutes to reach its destination. What is the work done?

The velocity of a ball goes on decreasing when it is thrown vertically upwards. When its velocity becomes zero, its potential energy becomes

A car is moving at $$100\ km/h$$. If the mass of the car is $$950\ kg$$, Its kinetic energy is:

Which one of the following possesses both kinetic and potential energies?