Prove P.

Prove P. Show all works (20 points) 1. CG for Torso and Head (assume it is at the height of underarm) Hip joint Knee joint Ankle joint A B C (10 points) Adult is sitting on chair as shown. Black dots represent center of gravity, and green dots represent joint. A, B and C are distance between joint and CG. Assuming total body weight is 130 pound and 5’-4” tall for female, 180 pound and 5’-10” tall for mail. Determine reasonable values for CGs and A,B,C Calculate the moment at knee joint if this person trying to rise from the chair without tiling of torso forward. CG for thigh 2. D (20 points) On the figure, D is 2” long which a perpendicular distance between center of rotation of knee and quadriceps force at 90 degree knee flex Using the moment from previous problem, determine the quadriceps force Based on the force, discuss if it is possible to rise from the chair while maintaining up -right posture. What actually we do when we rising from chair? Explain the reason in engineering terms. 3.