the amount of extention in an elastic spring varies directly as the weight hung on it, If a weight of 150 g produces an extension of 2.9 cm, then what weight would produce an extension of 17.4 cm?
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Then 1 cm would be extended by 150/2.9 gm of weight. ∴ 1 cm will be extended by 51.72 gm of weight. To produce an extension of 17.4 cm, 51.72*17.4 gm of weight will be needed.18-Feb-2015
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