Question

which is NOT TRUE about action and reaction force
A.action always equalreaction
B.reaction is always equal action
C.reaction force is in the opposite direction of the action force
D.reaction force is twice the magnitude of the action force
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Answer 1

Explanation:

Newtons's Third Law of motion says that "To every action , there is always an equal and opposite reaction"

Conclusions from the Newton's Third Law of Motion as follows

1. Forces always occur in pairs. Force on a body A by B is equal and opposite to the force on the body B by A.

2.The force on A by B and the force on B by A act at the same instant.

3.Action and reaction forces act on different bodies, not on the same body.

Answer 2

D. Reaction force is twice the magnitude of action force is NOT TRUE.

Explanation:

Newton's third law of motion introduced the concept of action and reaction.

Law of action and reaction states "When one object exerts a force on second object, the second object exerts a force which is equal in magnitude and opposite in direction".

With every force (push or pull) that a body A exerts on another body B, same magnitude of force is experienced on A by body B.

Individually each object experiences only one force.  Action-reaction forces always acts in pair.