Newton’ s Third Law To every action, there is always an equal and opposite reaction.
For example, when you hold the ball, a force acts on the ball( Action), and an equal and opposite force acts on your hand( Reaction).
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Action & Reaction forces always act on different bodies o o o
FAB = FBA
FAB: Force acting on A by B
FBA: Force acting on B by A o
Action & Reaction forces occur at the same instant
Conservation of Momentum o In an isolated system, the total momentum is conserved.
Example 1. In a Spinning top, total momentum = 0. For every point, there is another point on the opposite side that cancels its momentum.