Define the law of conservation of energy.

By giving an example, state and explain the law of conservation of energy.

Define the law of conservation of charge.

Assertion : A step-up transformer changes a low voltage into a high voltage. Reason : This violate the law of conservation of energy.

Draw a diagram to show that the energy flow is an ecosystem is governmend by the law of conservation of energy.

What is the law of conservation of energy?

Does Lenz's law violate the law of conservation of energy?

The potential energy of a freely falling object decreases progressively. Does this violate the law of conservation of energy ? Why ?

Illustrate the law of conservation of energy by discussing the energy changes which occur when we draw a pendulum bob to one side and allow it to oscillate. Why does the bob eventually come to rest ? What happens to its energy eventually ? Is it a violation of the law of conservation of energy ?\

Assertion : In an elastic collision of two billiard balls, the total knetic energy is conserved during the short time of oscillation of the balls ( i.e. when they are in contact ) . Reason : Energy spent against friction does not follow the law of conservation of energy .

Would it be right to ask someone to prove the law of conservation of energy?