Answer:
<em>The minimum pressure car tire pressure is 300,000 Pa</em>
Explanation:
<u>Pressure</u>
It's a measure of the force exerted by an object per unit surface:
![\displaystyle P=\frac{F}{A}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20P%3D%5Cfrac%7BF%7D%7BA%7D)
Where F is the force applied on a surface area A.
We are given the total weight of a car with passengers as Ft=30,000 N and we also know the area of contact of each tire with the ground as
.
The minimum pressure each tire can have is when the total weight is evenly distributed in all four tires, thus F=Ft/4=7,500 N.
Calculating the pressure:
![\displaystyle P=\frac{7,500}{0.025}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20P%3D%5Cfrac%7B7%2C500%7D%7B0.025%7D)
P=300,000 Pa
The minimum pressure car tire pressure is 300,000 Pa