alleryThe equation relating load arm and effort arm expresses the principle of:
AMonopoly
BMoments
CMotions
DMomentum
Answer & Solution
Correct answer: B. Moments
1. A lever balances turning effects, not forces.
2. The relation is named after the turning effect itself.
3. The equation expresses the principle of moments for a lever.
4. So the answer is moments.
_Source: syllabus Physics Part I, Ch 6 'Systems of Particles and Rotational Motion'_
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