2. In gait analysis, ground-embedded force plates are commonly used to estimate the ground-reaction forces in three dimensions (x, y, z) when a person's foot strikes the ground. Suppose the load cell used to measure each of these three force components (Fx, Fy, F,) has a uncertainty of approximately 2% of the measured value. What is uncertainty in the resultant force magnitude F = F? + F} + F? if the following peak force measurements are made: Fx = 136 N Fy = 680 N F, = 68 N Assume that F, is known exactly.
2. In gait analysis, ground-embedded force plates are commonly used to estimate the ground-reaction forces in three dimensions (x, y, z) when a person's foot strikes the ground. Suppose the load cell used to measure each of these three force components (Fx, Fy, F,) has a uncertainty of approximately 2% of the measured value. What is uncertainty in the resultant force magnitude F = F? + F} + F? if the following peak force measurements are made: Fx = 136 N Fy = 680 N F, = 68 N Assume that F, is known exactly.
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Transcribed Image Text:2. In gait analysis, ground-embedded force plates are commonly used to estimate the ground-reaction
forces in three dimensions (x, y, z) when a person's foot strikes the ground. Suppose the load cell
used to measure each of these three force components (F, Fy, F) has a uncertainty of approximately
2% of the measured value.
What is uncertainty in the resultant force magnitude F =
F + F} + F} if the following peak force
measurements are made:
Fx
= 136 N
Fy
= 680 N
F, = 68 N
Assume that F, is known exactly.
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