Question

A girl of mass 40kg wear heels with an area of 1cm/squre in contact with the ground the pressure on the ground is

Answer 1

Given:

• Mass of girl, m = 40 kg

• Area of heel = 1 cm²

To be calculated:

Calculate the pressure exerted on the ground when the girl stands .

Formula used:

• Force = m × g

• Pressure = Force/Area

Solution:

We have

mass is 40 kg and acceleration due to gravity is 9.8 m/s.

We know that,

Force = m × g

= 40 × 9.8

= 4 × 98

= 392 N

And

Area = 1 cm² = 1/10000 m²

Now,

Pressure = Force/Area

= 392 × 10000 / 1

= 3920000 N/m² or 3920000 Pa

Thus, the pressure exerted on the ground is 3920000 Pa.