Because the ball 'flexes' - thus losing a tiny percentage of its energy.
The action and reaction forces act on different objects. For two forces to cancel each other - and provide a net force of zero, for Newton's First Law - they must act on the same object.
Well, Professor Newton has taught that the reaction is always equal and opposite to the action, and we know that equal and opposite forces cancel each other. So it seems that the answer to the question must be: They always do.
Balanced forces, that are of equal strength.
It does work. The force of a person hitting a ball "cancels" out the force of the ball moving and brings it to a stop (to zero). Only then does the ball move in the direction it is hit, due to the overwhelming force applied by the person.
The action and reaction forces do cancel each other out, so that there is a net force of zero. When you push on a wall, the wall does not move because the action force that you exert and the reaction force that the wall exerts are equal but opposite and the net force is zero.
If they cancel, then their magnitudes must be equal.
Well in a single action-reaction pair, they cannot cancel out! The action and reaction forces act on different bodies. Lets say that we have a football. I kick it with 200 N of force. That is the action force, so the reaction force must be 200N(in the opposite direction) as well. The key here is that the reaction force did not act on the football, but on your foot! So the net force of the football is still 200 N in the direction I kicked it!Hope this helps some,-Sk Inventor
When two forces cancel each other out, -- their magnitudes (size) must be exactly equal -- their directions must be exactly opposite.
had that not been the case then the two forces would cancel each other as they act on the same body being equal and opposite
Forces that are equal and anti-parallel.
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