Physics 0625 · IGCSE · Forces

Forces — practice question

A plank stays level as it rests on a log of wood, which provides the pivot.
(a)[3]

Calculate the moment of the girl’s weight about the pivot and show that it is nearly $480\,\text{N m}$.

(b)[3]

Calculate the magnitude of force $F$.

Worked solution & mark scheme

This 6-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Moment = force \times perpendicular distance from pivot” …

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