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As per your syllabus, a rigid body is in MECHANICAL equilibrium when which conditions hold?
AOnly ΣF = 0 force balance
BΣF = 0 AND Στ = 0
CKE = 0 at all times
DOnly Στ = 0 torque balance
Answer & Solution
Correct answer: B. ΣF = 0 AND Στ = 0
Your syllabus: BOTH translational (ΣF=0) and rotational (Στ=0) equilibrium are required.
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