Centre of Gravity
Centre of Gravity
Centre of Gravity
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Segmental Radius <strong>of</strong> Gyration<br />
Thigh segment<br />
Make a ring<br />
<strong>of</strong> same<br />
mass and<br />
moment <strong>of</strong><br />
inertia. Its<br />
radius is the<br />
radius <strong>of</strong><br />
gyration, k.<br />
k<br />
PI thigh = m thigh k thigh<br />
2<br />
PThus,k thigh = /(I thigh / m thigh )<br />
Pk thigh = radius <strong>of</strong> gyration<br />
PDefine K thigh = radius <strong>of</strong><br />
gyration as proportion <strong>of</strong><br />
segment length<br />
PL thigh = /[(x d - x p ) 2 + (y d - y p ) 2 ]<br />
PK thigh = k thigh / L thigh
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