(a)[1]
Define pressure as force per unit area.
(b(i))[3]
A cylinder rests on a horizontal surface, as illustrated in Fig. 2.1. The measurements for the cylinder are: mass $= 5.09 \pm 0.01\,\text{kg}$, diameter $= 9.4 \pm 0.1\,\text{cm}$. Calculate the pressure exerted by the cylinder on the surface.
(b(ii))[3]
Calculate the absolute uncertainty in the pressure.
(b(iii))[1]
State the pressure together with its actual uncertainty.