Question
Question: In the fig shown, a cubical block is held stationary against a rough wall by applying force F then i...
In the fig 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.
Answer
N does not apply any torque.
Explanation
Solution
For equilibrium f = Mg and F = N. for maintaining rotational equilibrium N will shift downward. Hence, torque due to friction about COM = Torque due to Normal reaction about COM.