Question

Using the kinematic data provided, calculate the masses, CoM coordinates, and moments of inertia (about the proximal end of the segment) for the foot and shank segments (mass: 48.1 kg) (knee: (0.268,0.499)) (ankle: (.240, 0.113)) (Met: (.359, 0.043))

Answer 1

Solution

• The x and y coordinates of center of mass are defiend as:

and,

• For Foot segment we have:

where is:

replacing values:

Solving we obtain:

Similarly, the y-coordinate is:

Inserting values:

Solving we obtain:

Therefore:

and the mass is:

• For Shank segment we have:

Where, is:

Inserting (9) and data given values we get:

Solving we obtain:

Similarly, for the y-coordinate we have:

Inserting (9) and data given values:

Solving we obtain:

Therefore: