Question

Identify energy transformation in the following:

1. Hydro-electric power,
2. Battery,
3. Stretched bow with an arrow,
4. Explosion of a cracker.
5. Oscillating pendulum,
6. Hammering a mail.

Answer 1

Explanation

There are energy transformations in the following:

1. Hydroelectric power is the conversion of potential energy into kinetic energy and electrical energy.
2. Battery: A battery is a device that stores energy in the form of chemical energy. is active in its chemicals and can be converted into electric energy whenever it is needed. Thus, inside a battery, chemical energy is changed into electrical energy.
3. Stretched bow with an arrow = When an arrow is released from its bow, its energy changes from potential to kinetic.
4. Explosion of a cracker = In the firecracker, the energy is stored in the form of chemical energy. When we ignite the cracker, it bursts, and we hear a popping sound with some light. So the chemical energy stored in the firecracker is converted into light, sound, and heat energy.
5. Oscillating pendulum = The kinetic energy gets transferred into potential energy and back to kinetic energy. This process keeps on going on till the pendulum comes to rest.
6. Hammering a nail = When a hammer strikes a nail hard enough, the mechanical energy is converted to heat energy as the nail head heats up.