Suppose that a woman weighing 150 lb and wearing high-heeled shoes momentarily p

Question

Suppose that a woman weighing 150 lb and wearing high-heeled shoes momentarily places all her weight on the heel of one foot.

Part A

If the area of the heel is 0.60 in.2 , calculate the pressure exerted on the underlying surface in kilopascals.

Express your answer using two significant figures.

Part B

If the area of the heel is 0.60 in.2 , calculate the pressure exerted on the underlying surface in atmospheres.

Express your answer using two significant figures.

Part C

If the area of the heel is  0.60 in.2 , calculate the pressure exerted on the underlying surface in pounds per square inch.

Express your answer using two significant figures.

Explanation / Answer

F = 150 lb = 667.23 N

A = 0.6 in^2 = 0.000387 m^2

(a) pressure P = force/area

P = 667.23/0.000387

P = 1700 kPa

(b) 1 atm = 1.01325 Pa

P = 1724108/101325

P = 17 atm

(c) P = F/A = 150/0.6

P =250 lb/in^2

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