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ME 354 Vanth 5 - Exercise 4

ME 354 Vanth 5 - Exercise 4 - results because the opposite...

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Exercise 4 When a person walks, he/she does exert a force on the ground that is less than his/her body weight. Looking at the double hump curve of the ground reaction forces during the normal gait cycle, we see that the ground reaction force fluctuates both above and below that of the human body weight during walking. During the initial double limb support, the vertical reaction force starts off less than body weight but increases until it exceeds body weight and peaks at opposite foot’s toe off, where the force is higher than that of body weight. However, as one progresses into single limb support, this force reduces in magnitude below body weight. This
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Unformatted text preview: results because the opposite limb is in the swing phase and possesses upward momentum, reducing the amount of force exerted on the plate. Towards the end of single limb support (before opposite foot strike), the magnitude of the vertical reaction force increases and reaches a second peak that exceeds body weight. This occurs as the opposite limb possesses downward momentum as it prepares to make initial contact with the ground. During the second double limb support, the vertical force drops off below body weight completely as weight is fully transferred to the opposite limb....
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