The diagram below shows a uniform metre rule, weight W, pivoted at the 75 cm mark and

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The diagram below shows a uniform metre rule, weight W, pivoted at the 75 cm mark and balanced by a force of 2 N acting at the 95 cm mark.


a. Calculate the moment of the 2 N force about the pivot.

b. Use the principle of moments to calculate the value of W in N.

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