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You can know the mass needed to suspend the leg by putting down the distance between the hig point and the CG (x₁), between the hig point and the sling (x₂) and the leg's mass.

Enllaç a codi Mathjax d'equació de segon grau

The solution of the problem step by step is as follows

\begin{align} Mgx_1-mgx_2=0 =&\cssId{Step1}{Mgx_1=mgx_2}\\[3px] &\cssId{Step2}{ m = \frac{Mg * x_1}{g*x_2 }}\\[3px] &\cssId{Step3}{ m = \frac{M * x_1}{x_2 }}\\[3px] \end{align}

In the first step we make the equation summation of moments
In the seconde step we match the moment of the leg with the moment of the mass needed to suspend the leg
In the third step we isolate the mass needed to suspend the leg
In the fourth step we eliminate gravity as it is repeated

Please enter the following data to calculate the previous equation

Leg problem