The extension in an elastic string varies directly as the weight hung on it.If a weight of 150 g produces an extension of 2.8 cm ,what weight produce an extension of 19.6 cm?
*give the answer in kg*
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Let us consider the weight produce be ‘x’ gm.
2.9/150 = 17.4/x By cross-multiplying 2.9x = 150(17.4) 2.9x = 2610 x
= 2610/2.9 = 900
∴ 900 gm of weight is produced for an extension of 17.4 cm.
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