A student investigates how changing either the distance from the pivot or the angle…
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
A student investigates how changing either the distance from the pivot or the angle between the force and the lever arm affects the torque exerted on a shovel whose handle is modeled as a uniform rigid rod. The student makes the following four claims while holding the magnitude of the applied force constant.
(a) For each claim (I–IV) state whether the claim is True or False.
(b) For every claim you identified as True, provide a clear explanation referencing the relevant geometric quantities in the torque relationship.
(c) For every claim you identified as False, describe a specific counter-example (numerical or qualitative) that contradicts the claim and explain why the contradiction occurs.