Question

For every action there is an equal and opposite reaction. Do action and reaction act on the same body or different bodies?

Answer 1

According to Newton's third law of motion - “To every action, there is always an equal and opposite reaction.

ie, If a body A exerts a force F on another body B, Then B exerts a force –F on A”

Consider a pair of bodies A and B, according to the third law.

${{F}_{AB}}=-{{F}_{BA}}$

(force on A by B) = - (force on B by A)

Thus, action and reaction forces act on different bodies, not on the same body.