Michael Jackson is performing his signature anti-gravity leanpose during his Smooth Criminal performance. He maintains his leanat 45 degrees relative to vertical. M.J.'s anthropometric profilesas listed below.

- Height = 1.73 m

- Center of Gravity @ 0.56 = 0.97 m from feet

- Weight = 135 lbs = 605 N

1. How much torque needs to be generated by the plantarflexormuscles if M.J. holds the lean at 45 degrees statically?

2. Based on a study by Baxtor & Piazza (2013), the isometrictorque generated by the plantarflexor muscles is 169 N.m. Based onyour answer above (#1), could M.J. pull off the anti-gravity leantrick without the prop? Explain your answer.

3. Based on a study by Baxtor & Piazza (2013), the momentarm (force arm) length for the plantarflexor muscles is 53.4 mm(0.053 m). Based on this information and your answer above (#1),how much force do the plantarflexor muscles need to exert tomaintain the 45 degree lean?

1 N is about 0.225 lb. What is the plantarflexor force in poundof force?