mg=k*x0
k=mg/x0
W=k*x^2/2 = mg/x0 *x^2/2 = 0,163*9,8/0,023*0,76^2/2 Дж = 20 Дж
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mg=k*x0
k=mg/x0
W=k*x^2/2 = mg/x0 *x^2/2 = 0,163*9,8/0,023*0,76^2/2 Дж = 20 Дж