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Mass of the girl, m = 50 kg
Diameter of the heel, d = 1 cm = 0.01 m
Radius of the heel, r
Area of the heel
= π (0.005)2
= 7.85 × 10–5 m2
Force exerted by the heel on the floor:
F = mg
= 50 × 9.8
= 490 N
Pressure exerted by the heel on the floor:
= 6.24 × 106 N m–2
Therefore, the pressure exerted by the heel on the horizontal floor is
6.24 × 106 Nm–2.
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