Linear kinetics is concerned with the underlying causes of translation and of the changes of translation

Forces are vectors so they have: a magnitude, a direction, a point of application, occur in pairs and the pairs have same magnitude but opposite direction.

gravitational forces (weight), contact forces for example impact forces, fluid forces and shear forces/friction

An object will remain at rest or moving with constant velocity unless acted upon by an external force

An objects acceleration is proportional to the net force acting on the object and is in the same direction (F= m x a)

For every action there is an equal and opposite reaction (forces occur in equal and opposite pairs

Mass is a measure of inertia, it describes how hard it is to accelerate an object

a measure of an objects quantity of motion

Acceleration is needed so a net force can be applied and a corresponding impulse must be applied

We must apply an impulse equal and opposite to its original momentum e.g catching a ball in cricket

The pressure being exerted between two surfaces depends on the force and the area of contact: P= F/A. A smaller contact area = greater pressure