Question

1. Using the diagram of a pendulum, explain how the law of conservation of energy holds
true for three different positions of the bob.
2. Explain the change in energy of falling water in a hydro-electric power station.
3. How is the potential energy of a raised hammer different from the potential energy of a
stretched bow?
4. How can you prove that the sun is the biggest source of all energies?​

Answer 1

Explanation:

1. Law of conservation of energy state that energy can neither be created nor be destroyed it can only be converted into one form to another form.

Now, let us consider a pendulum in which to and fro motion will take place. When pendulum bob moves from its rest position (mean position) to another extreme position its kinetic energy will be converted into potential energy when it is raised at some height 'h'. Now when it come back to its mean position, then its potential energy will be converted into kinetic energy and this phenomenon will take place again and again.

2. The falling water rotates blades of a turbine, which then spins a generator that converts the mechanical energy of the spinning turbine into electrical energy. Hydroelectric power is a significant component of electricity production worldwide.

3. in the attachement above

4. in the attachement above

I hope it helps u dear friend ^_^♡♡