(a)[4]
Calculate the force applied to the road by the tyre.
(b)[3]
Use ideas about molecules to explain how this air produces a pressure on the tyre's inner surface.
Physics 0625 · IGCSE · Pressure
Pressure — practice question
Fig. 4.1 illustrates a car tyre touching the road. The section of tyre in contact with the road has an area of $0.015\,m^2$. The tyre applies a pressure to the road of $240\,kN/m^2$.