A body will be in complete equilibrium when it is satisfying______________?
Correct answer: C. Both Ist and 2nd condition of equilibrium
- A. 1st condition of equilibrium
- B. 2nd condition of equilibrium
- C. Both Ist and 2nd condition of equilibrium
- D. Impossible
Explanation
Complete equilibrium requires both translational equilibrium, with the resultant force equal to 0 N, and rotational equilibrium, with the resultant torque equal to 0 N m. Satisfying only one condition can still allow linear or angular acceleration. Students may choose a because they focus only on force balance and forget that torque must also balance.
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About Addition of Vectors
Vector addition combines directed quantities using the head-to-tail, parallelogram and component methods. Work includes finding the resultant magnitude and direction for two or more vectors, resolving vectors into perpendicular components, and distinguishing vector addition from scalar addition, where direction has no role.
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