Question

A fast-moving cyclist stops pedalling on reaching a hilly track. If he continues to move with the acquired energy, then assuming no loss of energy ______.

Options

• his kinetic energy remains constant at all times.

• his potential energy remains constant at all times.

• his total mechanical energy continuously increases.

• his total mechanical energy remains constant.

Answer 1

A fast-moving cyclist stops pedalling on reaching a hilly track. If he continues to move with the acquired energy, then assuming no loss of energy his total mechanical energy remains constant.

Explanation:

The Law of Conservation of Mechanical Energy states that a system’s total mechanical energy remains constant if no external work is done on it and no energy is lost to friction or air resistance.