A pipe-inspection robot uses a support pad to press against the inside surface of a pipe. The force acts normal to the surface. The pipe has a fragile lining, and the contact area of the pad can be increased.
| Quantity | Value |
|---|---|
| Force exerted by the pad | 900 N |
| Current contact area of the pad | 300 cm2 |
| Maximum pressure the lining can withstand | 24 000 Pa24\,000\ \text{Pa}24000 Pa |
Calculate the minimum increase in the contact area of the pad needed to keep the pressure at or below the maximum value.
108 exam-style questions on AQA GCSE Physics 5.5 Pressure and pressure differences in fluids, covering 5.5.1 Pressure in a fluid and 5.5.2 Atmospheric pressure. Each one has a worked solution and a mark scheme showing where the marks go.