Law of Motion chapter 9 class 9
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First Law of Motion
A body continues to be in the state of rest or uniform motion in a straight line unless acted upon by an external unbalanced force. The First Law is also called the Law of Inertia.
Second Law of Motion
The rate of change of momentum of an object is directly proportional to the applied unbalanced force in the direction of the force.
Third Law of Motion
Newton’s 3rd law states that every action has an equal and opposite reaction. Action and reaction forces are equal, opposite and acting on different bodies.
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