When the load on a wire is increasing slowly from 2kg to 4kg, the elongation from 0.6mm to 1.2mm. The work done during this extension of the wire is `
When the load on a wire is increasing slowly from 2kg to 4kg, the elongation from 0.6mm to 1.2mm. The work done during this extension of the wire is `(g=10m//s^(2))`
A. `14xx10^(-3)J`
B. `0.4xx10^(-3)J`
C. `8xx10^(-2)J`
D. `1.8xx10^(-2)J`
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From Hookes law
`F=(AY//L)xx x` should be valid.
`W=(1//2)(AY//L)(x_("final")^(2)-x_("initial")^(2))`
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