Force

A pull or a push upon an object

Forms of forces

Gravitational force, weight, normal force and frictional force

Gravitational force

Force that points towards the centre of the Earth

Frictional force

The force that resists movement between two surfaces that are in contact

Normal force

The force produced when an object is in contact with a surface

Buoyant force

The thrust force acting on an object that is floating on the surface of a fluid

Elastic force

Exists when a material is stretched or compressed

Force is a vector quantity

It has magnitude and direction

Magnitude

The quantity or value of a measurement

Instrument to measure force

Spring balance