Physics 0625 · IGCSE · Forces

Forces — practice question

Fig. 3.1 depicts a girl and a boy on a see-saw. The girl is 2.4 m from the pivot, while the boy is 1.6 m from the pivot. The girl’s weight is 300 N.
(a)[2]

Calculate the girl’s moment about the pivot.

(b)[3]

Calculate the boy’s weight $W$.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “force \times distance from pivot OR 300 \times 2.4” …

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