Kinesiology 3341A/B Lecture Notes - Lecture 6: Angular Acceleration, Quadriceps Femoris Muscle
1 Nov 2016
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Document Summary
You are a kinesiologist assessing a football player with a quad. injury. F = 2800n = 280kg- big- mass of a lion. Loads within our body are high, so likely of injury. In order to aid his recovery, the football player is performing some leg extension exercises. Red dot- middle of joint d = 6sin20. Moment on 200n force is 0- no distance. Moment of 250n is equal to 250 x d for both right and left- d distances are the same so moments cancel out. Doesn"t matter when you pick them, sums of moment are = to 0. M: add up moments blue: 250 x 0. 4 (- for clockwise moment) red: 200 x 1. 0m (-) green: 250 x 1. 6 (-) M = f(d) where is the d to give us 0 moment? d = m / sums of f d= 700nm / 700n = 1. 0m.
