The total length of a spring when a mass of 20g is hung f...
The total length of a spring when a mass of 20g is hung from its end is 14cm, while its total length is 16cm when a mass of 30g is hung from the same end. Calculate the unstretched length of the spring assuming Hooke's law is obeyed.
9.33cm
10.00cm
10.66cm
12.00cm
15.00cm
Correct answer is B
Let unstretched length = L
e1 = 14 - L and e2 = 16 - L
Using, m1e1 = m2e2
2014−L = 3016−L
L = 10cm
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