A metre rule is balanced at its 50 cm mark. A 20 g mass hangs at the 20 cm mark (see figure). To balance it, a 30 g mass must be hung at the

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MCQ (Single)Principle of Moments

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A uniform metre ruler is balanced horizontally on a knife edge placed at 60 cm mark when a mass m is suspended from 75 cm mark. Draw the diagram of the arrangement. State with reason (through mathematical steps) whether the mass of the scale is greater than, less than or equal to the mass m?

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