A six-legged walking robot has identical feet. Each foot has a contact area of 20 cm2. When the robot walks, it lifts three feet at a time. A camera is then fitted to the robot. The table shows the pressure on the floor in two situations.
| Situation | Number of feet on the floor | Pressure on the floor |
|---|---|---|
| Standing still, without the camera | 6 | 15000 Pa |
| Paused mid-step, with the camera fitted | 3 | 35000 Pa |
What is the weight of the camera?
30 N30\ \mathrm{N}30 N
120 N120\ \mathrm{N}120 N
210 N210\ \mathrm{N}210 N
240 N240\ \mathrm{N}240 N
132 exam-style questions on Edexcel GCSE Physics 15.2 Pressure in fluids, covering 15.2.1 Atmospheric pressure and height, 15.2.2 Pressure in fluids, 15.2.3 Pressure, force and area, 15.2.4 Pressure and depth, 15.2.5 Pressure in liquids: depth and density, 15.2.6 Upthrust, and 15.2.7 Floating and sinking. Each one has a worked solution and a mark scheme showing where the marks go.