Answer: Net torque acting on it is zero.
- A Net torque acting on it is zero
- B Net force is zero
- C Both net force and net torque are zero
- D Angular momentum is changing
Correct answer: A. Net torque acting on it is zero
Explanation: Rotational equilibrium requires Στ = 0. For complete (static) equilibrium, both ΣF = 0 and Στ = 0 are needed.
Torque about axis O equals the force F multiplied by the perpendicular distance r⊥ from the axis to the line of action of the force, producing rotation.
Concept context
Moment of inertia, torque, angular momentum, rolling motion. Very high JEE weightage.
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