Question

With pendulum as an example the law of conservation of energy.

Answer 1

The law of conservation of energy is an empirical law of physics. It states that the total amount of energy in an isolated system remains constant over time (is said to be conserved over time). A consequence of this law is that energy can neither be created nor destroyed, it can only be transformed from one state to another. The only thing that can happen to energy in a closed system is that it can change form, for instance chemical energy can become kinetic energy.

Answer 2

Answer:

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The motion of a pendulum is a classic example of mechanical energy conservation. A pendulum consists of a mass (known as a bob) attached by a string to a pivot point. ... However, gravity is an internal force (or conservative force) and thus does not serve to change the total amount of mechanical energy of the bob.