Answer to Question #168122 in Classical Mechanics for D

Question #168122

Calculate the mass m needed in order to suspend the leg shown in the figure below. Assume the leg (with cast) has a mass of 14.1 kg, and its CG is 34.2 cm from the hip joint; the sling is 80.4 cm from the hip joint.


1
Expert's answer
2021-03-03T11:25:43-0500

Given,

m1=14.1kgm_1=14.1kg

CG=34.2cmCG=34.2cm

m2=?m_2=?

sling length(sl)=80.4cm80.4cm


Now, 14.1kg×34.2=m2×80.414.1kg\times 34.2=m_2\times 80.4


m2=14.1×34.280.4kg\Rightarrow m_2=\frac{14.1\times 34.2}{80.4}kg

m2=5.997kg\Rightarrow m_2=5.997kg


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