Finding the weight of a ruler using moments
5. Repeat stages 2 to 4 for weights of 2N (using 200g of mass) to 9N (900g mass). Calculations: 1. When the ruler is balanced the anticlockwise moment caused by the weight of the masses is equal to the clockwise moment caused by the weight of the ruler. Therefore: weight of mass, W (N) x distance p (mm) = ruler weight R (N) x distance q (mm) 2. ................
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