Question

What is the pressure exerted by a boy

weighing 80kg on the ground when he stands

on his feet whose area is 200cm2 ?

A. 80 pa

B. 1600 pa

C. 40,000 pa

D. 400 pa​

Answer 1

Answer:

The answer is C. 40,000 pa

Explanation:

Given

Mass ( m) = 80 kg

Area ( A) = 200 cm^2

= 0.02 m^2

g = 10 m/s^2

First calculating Force (F)

= m * g

= 80 * 10

= 800 N

Now

Pressure (P) = F/ A

= 800/0.02

= 40,000 pa