Question

Which of the following is the property of Newton’s third law?

(a) A body moving with a uniform speed in a straight line cannot change the direction of motion by itself

(b) It is applicable only to a point particle

(c) It is a local relation

(d) The action and reaction cannot cancel each other

The question was asked during an interview.

I'd like to ask this question from Effect of Gravity topic in section Laws of Motion of Engineering Physics I

Answer 1

Right answer is (d) The action and reaction cannot cancel each other

The explanation is: The forces of action and reaction cannot cancel each other. This is because of action and reaction, although equal and opposite, always act on different bodies and so cannot balance each other.