Energy

Energy possesed by moving objects

A form of stored energy, like a rock on a cliff face

• Energy stored in the chemical bonds of substances. It is released from fuels when they are burnt.
• All substances have this

Stored energy in things that are compressed, twisted, flexed or wound up in something

Energy due to charged particles, most useful form is electrical current which is a flow of electrons from one place to another

Energy which travels through matter by compression waves. It is the vibrations travelling through the air

Special form of kinetic energy. It is made because of the movement of the particles in matter

A form of electromagnetic energy and is the most useful form of energy. Travels in waves

Released when the structure of an atom is being changed by splitting or fusing together. It can create large amounts of electrical and heat energy

Energy cannot be created or destroyed and when it transfoms the total energy before is equal to the total energy after.

• Ethanol-liquid fuel that can be made from starch. Added to petrol to make it last longer
• Bio-Diesel-can be made from chemicaly treated vegetable oil
• Hydrogen-gas fuel that can be made from water but requires alot of electricity and machines

Energy that can be reused and the source will never run out

The potential energy is always more than the kinetic energy given

Energy that cannot be reused and comes from a source that can run out

• All machines are forms of the six simple machines
• Lever
• Ramp
• Pulley
• Wheel
• Wedge
• Screw

• Wheels fitted with teeth
• Same size change direction or rotation
• Different sizes can magnify speed or force

A weak force turning a small gear fast makes a large gear turn slower with a stronger force

A strong force turning a large gear slowly makes a small gear turn faster with a weaker force

The point where a lever balances