Question

How much pressure is applied to the grand by an 80 KG man who is standing on squares stilts that measures 0.0 4m answer in units of PASecond section:- What is the pressure in the pounds per square inch answer in Units of IB/IN to the power of 2

Answer 1

First section:

Given data:

The mass of the man is,

$m=80\text{ kg}$

The side of a square slit is

$s=0.04\text{ m}$

The pressure can be expressed as,

$\begin{gathered} P=\frac{F}{A} \\ =\frac{mg}{(2s)^2^{}} \end{gathered}$

Here, g is the acceleration due to gravity whose value is

$9.81m/s^2$

Substituting the values in the above equation, we get:

$\begin{gathered} P=\frac{80\text{ kg}\times9.81m/s^2}{(2\times0.04\text{ m})^2}(\frac{1\text{ Pa}}{1kg/ms^2}) \\ \\ =122625\text{ Pa} \end{gathered}$

Thus, the pressure in Pascals is 122625 Pa.

Second section:

The pressure in pounds per square inch can be expressed as,

$\begin{gathered} P=122625\text{ Pa}(\frac{0.000145lb/in^2}{1\text{ Pa}}) \\ =17.78lb/in^2 \end{gathered}$

Thus, the pressure in pounds per square inch is

$17.78lb/in^2$