A physics textbook of mass m rests flat on a horizontal table of mass M placed on the ground. Let $N_{a - b}$ be the contact force exerted by body 'a' on body 'b'. According to Newton’s 3rd Law, which of the following is an action-reaction pair of forces?

see full answer

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*

An Intiative by Sri Chaitanya

$N_{ground \to table} and Mg + N_{table \to book}$

$mg and N_{table \to book}$

$N_{ground \to table} and N_{table \to ground}$

$(m + M) g and N_{table \to book}$

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

In this case the action-reaction pair of forces are actually contact forces acting between surfaces of two bodies in contact in contact.

The pair of gravitational force and normal reaction will not be a action reaction plane.

Watch 3-min video & get full concept clarity