Question

1. give an example of a situation where energy is conserved.

Explanation:

Energy conservation means the total energy in a closed - system remains constant. A pendulum is a common example. At its highest point, it has maximum potential energy and minimum kinetic energy. As it swings down, potential energy is converted to kinetic energy. At the lowest point, kinetic energy is maximum and potential energy is minimum. Throughout the motion, the sum of potential and kinetic energy (mechanical energy) is conserved in the absence of air - resistance and friction.

Answer:

A swinging pendulum.