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NEWTON’S THIRD LAW OF MOTION

Origin of the external force on the body

It explains how forces arises in Newtonian mechanics

Question 1

According to Newtonian mechanics, force never occurs singly in nature

Hint

Forces always occur in pairs

Third law of motion

To every action, there is always an equal and opposite reaction

Question 1

Forces always occur in pairs

Hint

Action and reactions are equal and opposite

Question 2

Action and reaction never cancel each other

Hint

The force exerted on an object is the action, and the force experienced by the object as a consequence of Newton's third law is the reaction

Question 3

Action comes before reaction 

Or

Action is the cause and reaction the effect

Hint

Any one of the force may be called action and the other reaction

Question 4

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

Hint

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