(a(i))[3]
Calculate the girl's moment about the pivot and demonstrate that it is near 460 Nm.
(a(ii))[3]
Calculate the weight $W$ of the brother.
(b)[4]
Calculate the mass of the girl. Be sure to include the unit in your answer.
Physics 0625 · IGCSE · Forces
Forces — practice question
A girl and her brother are positioned on opposite sides of a see-saw, as illustrated in Fig. 3.1. The diagram includes: girl, brother, a pivot, a distance of 1.9 m from the girl to the pivot, a distance of 1.2 m from the pivot to the brother, a downward force of 240 N on the girl, and a downward force W on the brother.
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