A long spring is stretched by 2 cm when P.E. is V. If the spring is stretched by 10 cm, what is the value of P.E.?
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1/2kx^2=pe
1/2k2^2=V
1/2k10^2=X
X=25 V
1/2k2^2=V
1/2k10^2=X
X=25 V
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