Complete the table

Calculate the potential energy of a stone of mass 40 kg on the terrace of a building of height 12 m.

A stone of mass 2 kg is thrown upwards from the ground with a velocity of 3 m/s. When it reaches maximum height, calculate its potential energy.

The heat of a health person beats 72 times per minute and each beat uses up about 1J of energy. Calculate the power of the heart.

Check whether the power marked in the motion used for pumping water from the well in your home and the power received during the working of it are equal, by considering the time taken to fill the tank and the height of the tank.