7.3) a. Calculate the pressure exerted on a disk in the lower back having an area of 20 cm^2 if a woman stands erect and supports the weight of her upper torso on that disk. The mass of the upper torso is 25 kg. Express this pressure in mm Hg.
b. If this same person lifts a load with her back, the force exerted on the disk may be large as 5000 N! Calculate the pressure on the disk for the 5000 N force and compare this pressure with that calculated in part a.
c. Is it surprising that such a pressure can cause a slipped or crushed disk?
Note: Guys, pls help me... Provide me an answer with solution/formula. Thanks!?
pressure = force/area
the rest follows