Question:
A 50 kg girl wearing high heel shoes balances on a single heel. The heel is circular with a diameter 1.0 cm. What is the pressure exerted by the heel on the horizontal floor ?
Answer:
Force applied (F) = 50 Kg f = 50 x 10 N
Diameter of the heel (d) = 1 cm = 0.01 m
Radius of the heel (r) = 0.5 cm = 0.005 m
Area of the heal (r) = πr2 = 3.14 x (0.005)2 = 7.86 x 10-5 m2
Therefore, Pressure = Force / Area = 50 x 10/ 7.86 x 10-5 = 6.2 x 106 Pa
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