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While lying in the supine position, the stress on the lumbar spine is estimated to be...

While lying in the supine position, the stress on the lumbar spine is estimated to be about 25 kg however, when standing the concentrated stresses can reach 75 kg. Furthermore, during the day it is commonly known that the human spine can compress 2 cm under this increased stress.

Use these measurements to estimate a Spring Constant for the bursa discs in the lumbar spine, in N/cm.

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Here elastic force is equal to change in weight

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