Question

Who exerts more pressure? a) A girl of 50 kg, wearing heels with an area of 1 cm2. b) An elephant of 4000 kg with foot area of 250 cm2.

Answer 1

The girl exerts more pressure.

Step-by-step explanation:

Pressure can be defined as the force exerted normally or perpendicularly per unit area.

i.e P = F/A

Girls

Area of the heel = 1cm² = 10^(-4) m²

Force = mg = 50 × 10 = 500N

Pressure =

`(500)/(10 ^( - 4) )`

`= 5 * {10}^(6)`

Elephant

Area = 250cm² = 2.5 x 10^(-2)b m²

Force = mg = 40000N

Pressure =

`\frac{40000}{2.5 * {10}^( - 2) }`

`= 1.6 * {10}^(6)`