An irregular lamina is suspended in turn from pin A and from pin B. Each time, a vertical line is drawn on the lamina using a plumb line. The diagram shows ...
Question 1 Report
An irregular lamina is suspended in turn from pin A and from pin B. Each time, a vertical line is drawn on the lamina using a plumb line. The diagram shows the result. Four points P, Q, R and S are marked on the lamina.
At which point is the centre of gravity of the lamina?
Answer Details
To find the centre of gravity of an irregular lamina, it is suspended from two different points (A and B). Each time, a vertical plumb line is drawn on the lamina. The centre of gravity lies at the intersection of these two lines.
The two dashed lines from pins A and B intersect at point P. Therefore, the centre of gravity of the lamina is at point P. Points Q, R, and S are not at the intersection and so cannot be the centre of gravity.
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