law of inertia - An object at rest will stay at rest unless acted on by a net force. An object will continue to travel at a constant speed in a straight line unless acted on by a net force.
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Newtons 2nd Law of motion
The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to the mass.
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Newtons 3rd Law of motion
For every ‘action’ force there is an equal and opposite ‘reaction’ force
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