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Per NCERT §6.8.1 (principle of moments / lever), at equilibrium a lever satisfies which condition?
ASum of clockwise τ equals sum of anticlockwise τ
BSum of all linear accelerations is zero only
CSum of all forces vanishes only (no torque)
DTotal weight equals total normal reaction force
Answer & Solution
Correct answer: A. Sum of clockwise τ equals sum of anticlockwise τ
NCERT §6.8.1: lever's law — moments about the fulcrum balance. CW torques = ACW torques.
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