Question

Select One Correct Option from the following: A block of mass m is at rest under the of force F against a wall as shown in the Which of the following statement is incorrect?
(A) f = mg, where f is the frictional force.
(B) F = N, where N is the normal reaction.
(C) F will not produce torque about centre of mass.
(D) N will not produce torque about centre of mass.

Answer 1

a option is correct.
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Answer 2

Answer:

Answer is option D)

Normal will not produce torque

Explanation:

Refer the image for diagram

You can see :

Frictional force is balanced by mg

And force applied is balanced by N (normal)

Torque due to F = 0

As it passes through centre of the body

Therefore Normal will not produce any torque !!

Thus option D is incorrect and it's ur answer