there are required 124 ft-lb of work to compress a spring from its free length y1 to that of y2= 2.5 in; the constant scale is K=100 lbf/in. Find the free lenght
free length "x" ,
Hooke’s Law, "F = kx"
"x = \\frac{F}{k} = \\frac{124}{100} =" 1.24 in
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