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I suppose this in a way depends on perspective at hand.

A reaction force is directly opposite of action force.

If a ball hit another ball, they actually hit each other at the same time with the same force if they are of the same size and mass.

If a ball hit a football player, then the football player equally hit the ball but in proportion to mass. This happen at the same time.

Now for the tricky part.

The action force could be considered to trigger a reaction force different to what it would normally be because it is observed. Would this not make reaction force before action force?

Still probably not valid.

As a reaction force is directly opposite of action force, it would not matter if the football player hits the ball hard or not so hard as a result of what he sees. Energy exchanged will be different, but always in proportion to mass.

The football player would only be exchanging action and reaction force with other objects/players before hitting the football, making another exchange of energy.

Claim:

All exchange of energy happens at the same time for both objects in proportion to their mass no matter the circumstances.

Newtons third law.

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14y ago
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Q: Are reaction forces always created after the action force?
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