The amount of extension in an elastic spring varies directly with the weight hung on it. If a weight of 250 gm produces an extension of 3.5 cm, find the extension produced by the weight of 700 gm
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If 25O extended 3.5 in direct variation
Then extension of 7OO gm = 75O\25O
3 x 3.5 = 1O.5 cm
It extended 1O.5 cm
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