The anount 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 wight of 700 gm.
Let the extension produced is 
cm
Weight (gm) | 250 |
|
Extension (cm) | 3.5 |
|
On cross multiplication, we get
Therefore extension produced is 9.8 cm
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