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Two identically charged particles are fastened to the two ends of a spring ofspring constant 100 N m ^(-8) C, find the extension In the length of the apring. Assume that the extension is small as scompared to the natural length . Justify this assumption after you solve the problem. |
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Answer» SOLUTION :`ELECTRIC force = spring force ` ` 1/(4piepsilon_0)(q^2 )/(x+0.1)^2=K(0.1+x) ` ` or (0.1+x)^3=(9xx10^9xx(2.0xx10^-8)^2)/10^-2 ` ` = (36xx10^9xx10^-16) /10^-2 ` `= 36xx10^-5 ` ` or x=3.6xx10^-6m ` |
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