Assume a person's mass is 69.0 kg and each of her shoes has an area of 200 cm². What is the compressive stress on her feet if her weight is spread out evenly over both soles of her shoes? By what factor f does the compressive stress change if only 10.0 cm² of each shoe is in contact with the floor (as might be the case for high-heeled shoes)? f= 11 Pa

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