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1st law
An object in motion will remain in motion unless acted on by an external force.
2nd law
The rate of change if momentum of an object is directly proportional to the resultant force acting on it, and the change in momentum is in the same direction as the force.
F=change in P/change in T
P=mv-mu
F=mv-mu/t
F=m(v-u/t)
F=ma
Inertia
An objects tendency to remain in the same state of motion, the more mass the more inertia and visa versa.
3rd law
Forces bodies enact on each other will always be equal and opposite forces but of the same type.