A rocket of `3 xx10^6 kg` mass takes off from a launching pad and acquires a vertical velocity of 1 km/s at an altitude of 25 km. Calculate the potential energy, and the kinetic energy.

A boy of mass 40 kg climbs vertically upwards on a coconut tree to a height of 10m. Calculate the potential energy gained.

A body of mass 6 kg is kept at a height of 5 m from the surface of earth. Find the potential energy of the body.

As you have learnt in the text, a geostationary satellite orbits the earth at a height of nearly 36,000 km from the surface of the earth. What is the potential due to earth’s gravity at the site of this satellite ? (Take the potential energy at infinity to be zero). Mass of the earth = 6.0Xx10^24 kg , radius = 6400 km.

A ball of mass 0.5 kg slows down from a speed of 5ms^-1 to 3ms^-1 , calculate the change in the kinetic energy of the ball.

A body of mass 2 kg is thrown up at a velocity of 10 ms. Find the kinetic energy of the body of the time of throw. Also find the potential energy of the body at highest point.

In the nucleus of _(92) U^(238) , two porotns at a distance of 6xx10^-1 m . Calculate their electrostatic potential energy.

A boy of mass 18 kg is running with a speed of 12 km/h. Find the kinetic energy possessed by the boy.