Working Energy

• Working energy is the form of energy in which work is done.

a) Kinetic Energy



- Energy of an object that is moving.
- The faster the object moves, the more kinetic eenrgy it possess.
- If two objects move at the same speed, the one with the greater mass has more kinetic enegy.
- A person who runs or cycles possesses kinetic energy.


b) Electrical Energy



- Electric charges moving through electrical conductors such as wires.
- Can be produced by geenrators and power stations.
- Lightnings and lighted bilbs possess electrical energy.


c) Sound Energy



- Produced by vibrating objects.
- Can travel through a medium such as a solid, liquid and gas but it cannot travel through a vacuum because there are no particles in a vacuum.
- Musical instruments produce sound energy.


d) Heat Energy



- Energy found in hot objects.
- Can increases the temperature of an object.
- Flows from a region with a higher temperature to a region with a lower temperature.
- The hotter the object, the higher the heat energy it gives out.
- The sun is the main source of heat energy.


e) Light Energy



- Energy produced and radiated by a luminous object.
- It enables us to see things round us.
- Sun is the main source of light energy.
- A burning candle and firewood produce light energy.


f) Mechanical Energy



- The total kinetic energy and potential energy possessed by an object.
- Produced by machines or by objects changing their positions.
- Mechanical energy is produced by a pendulum that oscillates and a rotating fan blade.