A) 4.9 cm
B) 0.49 cm
C) 9.4 cm
D) 0.94 cm
Correct Answer: A
Solution :
If x is the extension produced in spring. \[F=kx\] Þ \[x=\frac{F}{k}\]= \[\frac{mg}{k}=\frac{20\times 9.8}{4000}=4.9\,cm\]You need to login to perform this action.
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