Question

KIN 3112 Homework #3 Perform a dynamic analysis for a knee extension movement. The knee extensors insert on the tibia at an angle 0-30° and at a distance d-5.2 cm from the axis of rotation of the knee. The combined weight of lower leg and foot is F 48 N and its center of mass is r 0.27 m away from the knee joint axis. The joint angle with respect to the left horizontal is A-70 (Note: this is not the angle between thigh and lower leg). The angular acceleration of lower leg/foot segment has been measured to be a 15 rad/s (c (i.e. the person sits on a rigid surface and linear accelerations are close to 0 m/s?). Compute the following 20. e). Assume that the translation of the knee joint is negligible a) The rotational inertia of the limb. b) The gravitational torque due to the weight of the leg/foot (T c) The underlying knee muscle torque (T) d) The associated muscle force (F.) that gave rise to T (2 pts.) (2 pts.) (3 pts.) (2 pts.) ty

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