Question

Name two examples in which the mechanical energy of a system remains constant.

Answer 1

The mechanical energy of a system remains constant only when there are Conservative forces acting on a body. Examples are ;
- A ball thrown upward or been falling freely without any air resistance acting on it.
- The compression or relaxations of spring without considering friction.

Answer 2

Answer:

Explanation: the two examples to show that the mechanical energy of a system remains constant are:-

1) when you throw a ball upwards

2) the motion of a moving pendulum causes Mechanical enegy.