Question

Wisnu has a mass of 50 kg. He wear shoes which have the total area of contact to the floor 500 cm2. Calculate the pressure given to the floor.

Answer 1

Answer:

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

.