The extension of an elastic spring is found to vary directly with the weight suspended from it. If a weight of 75 kg produces an extension of 1.4 cm, calculate the weight that would produce an extension of 9.8 cm. 65
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Let us consider the extension produced be ‘x’ cm
250/3.5 = 700/x
By cross-multiplying
250x = 700(3.5)
250x = 2450
x = 2450/250
= 9.8
∴ The extension produced is 9.8 cm for the weight of 700gm
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