Let the magnitude of the applied force be F, and the distance between the line of action and axis of rotation be r.
Torque is then given as:
The line of rotation is along the direction of the force applied. The axis of rotation is at P.
r = x sin ɸ
Find TF, the torque about point P due to the force applied by the Achilles' tendon.
Express your answer in terms of F, phi, and x.
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