Physics | Work, Energy, & Power (Terms)

Work

Is done when the object is moved in the direction which force is applied.

A scalar quantity, defined as the energy transferred to or from an object by applying a force along a displacement.

Unit is expressed in Joule (J)

Energy

The ability or capacity to do work.

The amount of ___ transferred to an object is equal to the work done in it.

Unit is expressed in Joule (J)

Law of Conservation of Energy

Energy cannot be created nor destroyed. It can be transformed from one form to another, but the total amount of energy never changes.

Potential Energy

Energy stored in an object due to its position, state, or configuration.

Kinetic Energy

Energy that a moving object has due to its motion.

Power

The amount of work in the given period of time.

The greater the work done and the less time needed, the greater the power.

Unit is expressed in Watt (W)

Mechanical Power

Type of Power

Engines and motors, machines, human power.

Electrical Power

Type of Power

Household appliances, electronics, lighting.

Thermal Power

Type of Power

Heating systems, power plants.

Renewable Power

Type of Power

Solar power, wind power.