Betsy is standing on the ground with her right hip flexed 90 and her right knee flexed 60", with the right ankle plantar flexed 90 such that it is in a straight line with the shank. If she wants to extend her knee with an angular acceleration of 3509/s?, find the force she will need to exert with the quadriceps muscle group to do so. Assume that the quadriceps muscles and the weight of the leg are the only forces to be accounted for in this scenario. Mass of shank and foot= 4.15 kg Length of shank and foot= 0.55 m Knee is flexed 60 distance btw line of pull of the quads and knee joint center- 5.5 cm Shank/foot COM is in center of combined segments Moment of inertia of shank/foot= 0.217 kg"ml