Forces

A push, pull or twist (measured in Newtons)

A contact force between two objects that are touching; it usually acts to slow things down or to prevent movement

A contact force on objects moving through the air (usually slowing the object down)

A contact force on objects moving through water (usually slowing the object down)

A contact force that pushes things upwards in liquids and gases

A non-contact force that is a force of attraction between any two objects

A non-contact force that can attract or repel things (when certain materials rub together)

A non-contact force that attracts objects made of iron and other magnetic materials

The force of gravity pulling on the mass of an object (measured in Newtons)

The amount of matter in an object (measured in kilograms)

Making a material longer

Making a material shorter

A material that changes shape when a force is applied, but which returns to its original shape when the force is removed

The point beyond which an object no longer behaves like an elastic one

The extension of a spring is proportional to the force applied (up until the elastic limit is reached)

A material that changes shape when a force is applied, but which does not return to its original shape when the force is removed

A device used for measuring the size of a force

The amount of force pushing on a certain area measure in Pascals (basically how spread out a force is)

Pressure(Pa) = Force(N) / Area(m2)

Standard units used all over the World (eg time is always measured in seconds, energy is always measured in joules, pressure is always measured in pascals, force is always measured in newtons)

When two forces on an object are the same strength but in opposite directions

When two forces working in opposite directions on an object are not the same strength, resulting in a change in motion of the object