In runners, an overuse injury created by overpronation of the foot can lead to "compartment syndrome". This syndrome is characterized by high pressure and swelling in the soleus muscle behind the tibia. You want to estimate how much wall stress is created in the connective tissue sheath surrounding the muuscle when pressure in the muscle is elevated. You model the muscle sheath as a cylinder as shown to the right. Pressure inside the cylinder is 10 mmHg. The wall of the cylinder has a uniform thickness of 0.2 cm. The diameter of the cylinder is 4 cm. Calculate the mean normal stress in the x direction in the wall of the cylinder.

In runners, an overuse injury created by overpronation of the foot can lead to "compartment syndrome". This syndrome is characterized by high pressure and swelling in the soleus muscle behind the tibia. You want to estimate how much wall stress is created in the connective tissue sheath surrounding the muuscle when pressure in the muscle is elevated. You model the muscle sheath as a cylinder as shown to the right. Pressure inside the cylinder is 10 mmHg. The wall of the cylinder has a uniform thickness of 0.2 cm. The diameter of the cylinder is 4 cm. Calculate the mean normal stress in the x direction in the wall of the cylinder.

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