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Manipal MET2014PhysicsLaws of Motion

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

Options

  1. Africtional force f=m g
  2. BF=N, N is normal reaction
  3. CF does not apply any torque
  4. DN does not apply any torque

Correct answer

D. N does not apply any torque

Step-by-step solution

For equilibrium, aligned f & =M g F & =N aligned 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.

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