In a car's hydraulic braking system, when the driver presses the brake pedal, a force of 45 N45\text{ N}45 N is applied normal to the surface of the master cylinder piston. The pressure transmitted through the brake fluid is 125 000 Pa125\,000\text{ Pa}125000 Pa.
Calculate the surface area of the piston. Give your answer in standard form and include the correct SI unit.
Practise AQA GCSE Physics Pressure and pressure differences in fluids (physics only) with exam-style questions for Foundation and Higher tier. 27 questions covering Pressure in a fluid and Atmospheric pressure, matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.