Kinetic energy

In physics, the kinetic energy (KE) of an object is the energy that it has due to its motion. It is defined as the work needed for an object of a known mass to accelerate to a given velocity. This energy  the object gains during its acceleration, will be maintained unless its speed changes.


The quantity power is the rate at which work is done. The quicker work is done the greater the power.


The size of the current is the rate of flow of charge. Electrons are negatively charged particles which transfer energy through wires as electricity

Electrical power

The power of an appliance is the energy that is transferred per second. Electric power is the rate, per unit time at which electrical energy is transferred by an electric circuit

Gravitational potential energy

Gravitational potential energy is the energy an object has due to its height above Earth. The equation for gravitational potential energy is GPE = mgh, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 N/m2 on Earth), and h is the height above the ground in meters.

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