Topic summary definitions.
A force -
“a push or a pulling action applied upon an object. Measured in Newtons (N)”
First law of motion - "A body continues in a state of rest or uniform velocity unless acted upon by an external or unbalanced force."
Inertia – “The resistance of an object to changes in motion”
Second law of motion - “When a force acts on an object, the rate of change of momentum experienced by the object is proportional to the size of the force and takes place in the direction in which the force acts.”
Third law of motion - "For every action, there is an equal and opposite reaction."