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In the early days of aviation, female passangers were not allowed to wear high-h

ID: 1396435 • Letter: I

Question

In the early days of aviation, female passangers were not allowed to wear high-heeled shoes inside the aircraft becasue the floors were too thin ito withstand high pressures? (Recall the material fracture stress concept!) As a person wearing hight-heeled shoes walks, entire weight is momentarily placed on one heel of the high- heeled shoes. If the shoe heel has an area of 1.50 cm^2 and the person weights 121 lb how large is maximal pressure on the floor? 550 lb/inch^2 631 lb/inch^2 521 lb/inch^2 210 lb/inch^2

Explanation / Answer

Area = A = 1.5 cm2 = 1.5 / (2.54)2 in2              (since 1 inch = 2.54 cm)

A = 0.2325 in2

weight = F = 121 lb

pressure is given as ::

P = F/A

P = 121 / 0.2325

P = 521 lb/in2