Find the pressure exerted by body of person from its heel of a shoe standing on it. The person has the body mass of 50kg and heel are is 4 cm2? (
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Mass of the girl, m=50kg
Diameter of the heel, d=1cm=0.01m
Radius of the heel, r=
2
d
=0.005m
Area of the heel =πr
2
=π×(0.005)
2
=7.85×10
−5
m
2
Force exerted by the heel on the floor:
F=mg
=50×9.8
=490N
Pressure exerted by the heel on the floor:
P=
Area
Force
=490/(7.85×10
−5
)=6.24×10
6
N/m
2
Therefore, the pressure exerted by the heel on the horizontal floor is 6.24×10
6
N/m
2
.
Explanation:
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