For rotational equilibrium
Correct answer: B. ΣF=0, Στ=0
- A. ΣF=0
- B. ΣF=0, Στ=0
- C. Στ=0
- D. ΣF and Στ≠0
Explanation
For rotational equilibrium, the net force acting on the object must be zero (ΣF=0) and the net torque (Στ) acting on the object must also be zero.
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Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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