IB Physics SL B 3 1 Pressure Questions

Practise IB Physics SL B.3.1 by calculating pressure from force, area, density and depth in everyday and fluid situations.

Exam points

Define pressure as force per unit area, P = F/A, for a force perpendicular to a surface.
Calculate and interpret pressure, force or area using complete mark-scheme evidence and consistent units.

[Maximum number: 2]

A solid cylinder of height h and density $\rho$ rests on a flat surface.

Show that the pressure $p_{\mathrm{C}}$ exerted by the cylinder on the surface is given by $p_{\mathrm{C}}=\rho g h$ .

weight of cylinder $=A h g \rho$ $\text { pressure }=\frac{F}{A}=\frac{A h g \rho}{A}$

Marking guidance:

Allow use of $A=\pi r^{2}$ in MP1.

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