Work Energy and...

The water stored in a reservoir possesses :

An object of mass $$1  kg$$ has a P.E. of $$1  J$$ relative to the ground when it is at a height of

The mass of an object $$P$$ is double the mass of $$Q$$. If both move with the same velocity, then the ratio of K.E. of $$P$$ to $$Q$$ is

A boy of mass $$40\ kg$$ runs up a flight of $$50$$ steps, each $$10\ cm$$ high in $$14\ s$$. So, work done by the boy is:

Kinetic energy of a body depends on its:

A fruit hanging from the top branch of a tree possesses

A stone tied to a string is rotated in a vertical plane. If mass of the stone is $$m$$, the length of the string is $$r$$ and the linear speed of the stone is $$v$$,When the stone is at its lowest point, then the tension in the string will be :

In which form, the energy is stored in a fuel?

A string of length $$L$$ and force constant $$K$$ is stretched to obtain extension $$l$$. It is further stretched to obtain extension $${l}_{1}$$. The work done in second stretching is

A crane pulls up a car of mass $$500kg$$ to a vertical height of $$4m$$. So, work done by the crane is: