Question: 21. Perform a dynamic analysis for a knee extension movement. The knee extensors insert on the tibia at an angle A = 35 and at

21. Perform a dynamic analysis for a knee extension movement. The knee extensors insert on the tibia at an angle A = 35 and at a distance d = 5.4 cm from the axis of rotation of the knee. The combined weight of lower leg and foot is Fwt = 49 N. Rotational inertia of the combined lower leg and foot is | = 0.543 kgm?. The joint angle with respect to the right horizontal is 8 = 115. The angular acceleration of lower leg / foot segment has been measured to be a = +16 rad/s2. The horizontal acceleration is computed to be ax = +0.235 m/s?, while the vertical acceleration is ay = + 0.146 m/s2. Compute the following: The gravitational torque due to the weight of the leg/foot (Tg). (2 pts.) The underlying knee muscle torque (Tm). (2 pts.) The associated muscle force (Fm) that gave rise to Tm. (2 pts.)

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