Question

Write a few daily examples in which you observe conservation of energy.

Answer 1

Hint: The law of conservation of energy states that energy can neither be created nor destroyed but it can only be converted from one form of energy of another form of energy. This means that an object or a system always has the same amount of energy until and unless it is added from a foreign body.

Complete step by step answer:
According to the law of conservation of energy, energy can be neither created nor destroyed. It can be transformed from one form to another like thermal energy to electrical energy, mechanical energy to thermal energy and so on.
Daily life examples of Conservation of energy:
1) Human metabolism, the food we take gives us energy which we use to move, work, exercise, play.
2) When a moving car hits another car which is parked to make it move, energy of the moving car is transferred from the moving car to the parked car.
3) Water is used to produce electricity. Water falls from the sky, converting potential energy to kinetic energy. This energy is then used to rotate the turbine of a generator to produce electricity. In this process, the potential energy of water in a dam can be turned into kinetic energy which can then become electric energy. So, one form of energy is converting into another form and this process continues.
4) When kicking a football which is resting on the ground, energy is transferred from the player’s body (leg) to the resting football, setting it in motion.
5) When we play piano, our fingers hitting piano keys transfer energy from our hands to the piano keys.

Note:The law of conservation states that certain physical properties (i.e., measurable quantities like mass, energy) do not change in the course of time within an isolated physical system.