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 1

Radius = 1/2 = 0.5 cm = 0.005 m
weight = Force = 50N

Area = Area of a circular heel
= πr^2
= π× (0.005)^2
= (22/7) × 0.000025
= 55/700000
= 11/140000 m sq.

Pressure = Force/Area
= 50 ÷ (11/140000)
= (50×140000)/7
= 7000000/7
= 1000000 Pascal