In the figure shown, a cubical block is held stationary against a rough wall by applying force ' F ", then incorrect statement among the following is

Question

In the figure shown, a cubical block is held stationary against a rough wall by applying force ' F ", then incorrect statement among the following is (A) frictional force f = mg (B) F = N, N is normal reaction (C) F does not apply any torque (D) N does not apply any torque

Tardigrade Admin · Accepted Answer

For equilibrium, f=M g F=N For rotational equilibrium normal will shift downward. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/5121354bb5eaba41e8990e1b4e621101-.png" /> Hence torque due to friction about centre of mass = Torque due to normal reaction about centre of mass.

Q. In the figure shown, a cubical block is held stationary against a rough wall by applying force ' $F$ ", then incorrect statement among the following is

frictional force f = mg

F = N, N is normal reaction

F does not apply any torque

N does not apply any torque

For equilibrium, $f = M g$
$F = N$
For rotational equilibrium normal will shift downward.

Hence torque due to friction about centre of mass = Torque due to normal reaction about centre of mass.

Q. In the figure shown, a cubical block is held stationary against a rough wall by applying force ' F ", then incorrect statement among the following is