Which one is not a type of dynamic equilibrium ?
Correct answer: C. Static equilibrium
- A. Rotational equilibrium
- B. Translational equilibrium
- C. Static equilibrium
- D. Both A and C are corret answer
Explanation
Static equilibrium means the body is at rest, whereas dynamic equilibrium involves uniform motion with zero resultant force and, where relevant, zero resultant torque. Therefore static equilibrium is not a type of dynamic equilibrium. Students may choose d by treating rotational equilibrium as static, but rotational equilibrium can occur during constant angular motion.
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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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