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Chapter 1: Q5 DQ (page 389)

You have probably noticed that the lower the tire pressure, the larger the contact area between the tire and the road. Why?

Short Answer

Expert verified

The pressure is inversely related to the contact area.

Step by step solution

01

Understanding the relation of pressure and force

In this question, the relation between pressure, force and cross-sectional area will be used in order to evaluate the reduction in tire pressure.

02

Determining the tire pressure

The relation of pressure can be written as:

P=FA

Here, Fis the force and Ais the cross-sectional area.

In the above relation, the pressure is inversely related to the cross-sectional area of the tire. When the pressure in the tire rises, then the area will reduce. So, if the tire pressure is lowered, the contact area between the tire and the road will be larger.

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