Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle 40 cm from her knee joint. She holds her leg so that the horizontal distance from her knee joint to the weight is 30 cm. (Show all work)A. For this position, what torque is created by the weight about her knee joint axis?B. If the moment arm of the knee extensor muscles is 4 cm about the knee joint axis, what amount of force must these muscles produce to hold the leg in the position described? Ignore the weight of the leg. 40 cmGKVM?AltFn7. Leigh is doing a knee extension exercise using a100 N weight strapped to her ankle 40 cm from herknee joint. She holds her leg so that the horizontaldistance from her knee joint to the weight is 30 cm.(Show all work)a. For this position, what torque is created bythe weight about her knee joint axis?b. If the moment arm of the knee extensormuscles is 4 cm about the knee joint axis,what amount of force must these muscles30 cmproduce to hold the leg in the positiondescribed? Ignore the weight of the leg.overthe

Given, Force=100N Distance=40cm

Answered: Leigh is doing a knee extension…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Leigh is doing a knee extension exercise using a 100 N weight strapped to her ankle 40 cm from her knee joint. She holds her leg so that the horizontal distance from her knee joint to the weight is 30 cm. (Show all work) A. For this position, what torque is created by the weight about her knee joint axis? B. If the moment arm of the knee extensor muscles is 4 cm about the knee joint axis, what amount of force must these muscles produce to hold the leg in the position described? Ignore the weight of the leg.

40 cm
G
K
V
M
?
Alt
Fn
7. Leigh is doing a knee extension exercise using a
100 N weight strapped to her ankle 40 cm from her
knee joint. She holds her leg so that the horizontal
distance from her knee joint to the weight is 30 cm.
(Show all work)
a. For this position, what torque is created by
the weight about her knee joint axis?
b. If the moment arm of the knee extensor
muscles is 4 cm about the knee joint axis,
what amount of force must these muscles
30 cm
produce to hold the leg in the position
described? Ignore the weight of the leg.
overthe

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