Physics
“The action and reaction are equal in magnitude”. Is this statement true?
Laws of Motion
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Answer
Yes, action and reaction are equal in magnitude.
Example — The spring of balance A pulls the spring of balance B due to which we get some reading in balance B. The same reading is seen in balance A because the spring of balance B also pulls the spring of balance A by the same force.
The pull on the spring B by the spring A is the action FBA and the pull on the spring A by the spring B is the reaction FAB.
This demonstrates that "to every action, there is an equal and opposite reaction" (i.e., in magnitude FAB = FBA but they are in opposite directions. )
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