Question

A ball of mass m is dropped from height 'h'.

विकल्प

• Potential energy of the ball at ground level is mgh.

• Potential energy of the ball at height h is mgh.

• kinetic energy of the ball at ground level is mgh.

• Both potential energy of the ball at height h is mgh and kinetic energy of the ball at ground level is mgh.

Answer 1

Both potential energy of the ball at height h is mgh and kinetic energy of the ball at ground level is mgh.

Explanation:

At height h, the ball’s potential energy is mgh. As it falls, this energy changes into kinetic energy. Just before reaching the ground, its kinetic energy is mgh, assuming air resistance is ignored. Its potential energy at ground level is zero.