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 body of mass 30 kg is raised from the floor to a table height 1 meter. Relative to the ground, what is the potential energy of the body

What is the potential energy of an object of mass 'm' at a height 'h'?

The kinetic energy of an object of mass, m moving with a elocity of 5 ms^-1 , is 25J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?

A man of mass 60 kg walks up to the top of a building of height 15 m. Calculate the increase in potential energy.

When an air bubble rise in water, what happens to its potential energy?

What will be the potential energy of a body when its mass becomes doubled.

A body of mass ‘m’ is moving with velocity ‘v’: If the velocity is doubled what will be its kinetic energy?

A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?

An object of mass 100 kg is accelerated uniformly from a velocity of 5 m s^-1 to 8m s^-1 in 6 s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.

A person trying to lose weight (dieter) lifts a 10 kg mass, one , thousand times, to a height of 0.5 m each time. Assume that the potential energy lost each time she lowers the mass is dissipated, (a) How much work does she do against the gravitational force? (b) Fat supplies 3.8 xx 10^7 J of energy per kilogram which is converted to mechanical energy with a 20% efficiency rate. How much fat will the dieter use up?