alleryStart learning →The shortest distance from the pivot point to the line along which a force acts is the:
ARotational inertia
BPerpendicular lever arm
CTotal force magnitude
DAngular displacement
Answer & Solution
Correct answer: B. Perpendicular lever arm
1. Torque depends on a distance measured a particular way.
2. The perpendicular lever arm is the shortest distance from the pivot point.
3. It is measured to the line along which the force acts.
4. It is drawn as a dashed line in the standard diagram.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 9 'Statics and Torque', sections 9.1-9.5_
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