Question

A 40 kg box has a surface area of 0.2 m2, determine its pressure.

Answer 1

Answer:

P = 1960 Pa

Explanation:

The pressure is computed as the force acting upon a surface divided by the area of the surface

$P=\frac{F}{A}$

The box has 40 kg, it presses on its own surface when placed over a table or any flat area. The acting force is its weight.

$F = W = m.g = 40 kg \ 9.8m/sec^2 = 392 N$

The pressure is:

$P=\frac{392N}{0.2m^2}=1960 \ Pa$