- 3 Pts Leigh Is Doing A Knee Extension Exercise Using A 100 N Weight Strapped To Her Ankle That Is 40 Cm Away From Her 1 (47.94 KiB) Viewed 46 times
(3 pts) Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle that is 40 cm away from her
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(3 pts) Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle that is 40 cm away from her
(3 pts) Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle that is 40 cm away from her knee joint. She is holding her leg so that the horizontal distance from her knee joint to the weight is 30 cm and the horizontal distance from her knee joint to the center of mass of her leg and foot combined is 10 cm (see figure below). The weight of her leg and foot combined is 32 N. The moment arm between her knee joint and the line of action of the knee extensor muscle force is 4 cm in the current position a) What amount of force must her knee extensors produce to hold her leg in this position? b) If the angle of insertion of her knee extensors is 15 degrees in this position, how much of the muscle force is contributing to rotating the limb? 40 cm WEG 0:00 10 cm arbeta 3 toitus on lugn Custot no lo que ens Tom Holland 30 cm o loco de todos (a) Muscle force required to hold this position: (b) Force contributing to rotating the limb:
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