CAIE IGCSE Physics 1.8.2 Pressure Varies with Force and Area in Questions

Practise explaining how force and contact area determine pressure and applying p = F/A to practical situations with CAIE IGCSE Physics questions and mark schemes.

Exam points

Explain how force and contact area determine pressure and apply p = F/A to practical situations.

[Maximum number: 3]

Fig. 3.1 shows a person moving across an ice-covered pond to reach a ball on the ice.

Fig. 3.1

Explain why this way of moving across the ice is safer than walking. Use your understanding of pressure in your answer.

(force of gravity / weight of person is spread over a much) greater area
$p=F / A \mathbf{O R} p \propto 1 / A$
(force is same so) pressure is lower (so ice is less likely to crack)

All question bank results loaded

CAIE IGCSE Physics 1.8.2 Pressure Varies with Force and Area in Questions question 1