Assertion and Reason on Action-Reaction Pairs – Rankers Physics

Third Law of Motion: Practice Problem & Solution

Assertion (A): A block is hanging from spring. Spring force on block and gravitational force on block are not action and reaction pair. Reason (R): Action and reaction force acts in opposite direction.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Short Solution (Best for NEET):

To solve this problem, we apply the core principles of Third Law of Motion. Understanding the underlying formula is key to arriving at the correct answer below:

Action and reaction pairs act on different bodies. Both spring force and gravitational force act on the same block, so they are not an action-reaction pair. Both A and R are true statements, but R does not correctly explain A.

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