Newton‘s First Law
A body continues in its state of rest or of uniform motion in a straight line unless an external force acts on it. It is based on law of inertia. Inertia is the property of a body by virtue of which is opposes any change in its state of rest or of uniform motion in a straight line.
Newton‘s Second Law
The rate of change of momentum of a body is directly
proportional to the force applied on it and change in
momentum takes place in the direction of applied force.
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Newton‘s Third Law
For every action, there is an equal and opposite reaction
and both act on two interacting objects.
Rocket is propelled by the principle of Newton‘s third law