During heavy lifting, a disk between spinal vertebrae is subjected to a 5000-N compressional force. (a) What pressure is created, assuming that the disk has a uniform circular cross section 2.00 cm in radius? (b) What deformation is produced if the disk is 0.800 cm thick and has a Young’s modulus of 1.5×109 N/m2 ?

Problem 77PE

Solution 77 PE

Step 1 of 4:

In this question, we need to find the pressure created on spinal cord disk

In part (b) we need to find the deformation produced

Part a:

Data given

Compression force

Radius of disk

Thickness of disk

Young’s modulus

Step 2 of 4:

We shall find the area of the disk, using

Substituting for we have

Thus we have area of the disk as