$A$ wire is suspended by one end. At the other end,a weight equivalent to $20\, N$ force is applied. If the increase in length is $1.0\, mm$,the ratio of the increase in energy of the wire to the decrease in gravitational potential energy when the load moves downwards by $1\, mm$ will be:
- A$1$
- B$1/4$
- C$1/3$
- D$1/2$
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If the force constant of a wire is $K$,the work done in increasing the length of the wire by $l$ is
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View Solution$A$ wire of length $L$ and area of cross-section $A$ is made of a material with Young's modulus $Y$. It is stretched by an amount $x$. The work done in stretching the wire is:
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