A spring of $40\ mm$ long is stretched by the application of a force. If $10\ N$ force required to stretch the spring through $1\ mm$, then work done in stretching the spring through $40\ mm$

Question

Dr. Abubacker · Accepted Answer

(d) Here $k = \frac{F}{x} = \frac{10}{1 	imes 10^{- 3}} = 10^{4}\ N/m$
$W = \frac{1}{2}kx^{2} = \frac{1}{2} 	imes 10^{4} 	imes \left( 40 	imes 10^{- 3} ight)^{2} = 8J$

Q. A spring of $40\ mm$ long is stretched by the application of a force. If $10\ N$ force required to stretch the spring through $1\ mm$, then work done in stretching the spring through $40\ mm$

Explanation

Reviewed by Dr. Abubacker

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