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A uniform metre rule balances horizontally on a knife edge placed at the 58 cm mark when a weight of20 gf is suspended from one end.(i) Draw a diagram of the arrangement.(ii) What is the weight of the rule ?Ans. (ii) 105 gf |
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Answer» When the edge is placed at 58 cm mark and 20 g weight SUSPENDED at ONE end, then uniform scale would be balaced. ... A weight of 20 g is placed at 58 cm mark. So the clockwise moment due to mass of the scale will be W(50-42) = 8W. The anticlockwise moment due to mass 20g will be 20*(50-8) = 840 |
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