Grade 10 Physics · Strand 1: Mechanics and Thermal Physics · Pressure
Transmission of Pressure in Fluids
A short Grade 10 Physics lesson for the CBE curriculum, part of Mechanics and Thermal Physics: Pressure. Learn it on any phone with notes and slides, then check yourself with a quick quiz and earn XP. This lesson is free.
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1. Why do hydraulic machines such as car brakes use oil instead of air?
- A. Oil is incompressible, so it transmits pressure instead of being squeezed
- B. Oil is lighter than air, so it flows more easily
- C. Air is a liquid that boils at low temperatures
- D. Oil can be compressed to store extra energy
2. A mechanic pushes a small piston of area 0.004 m^2 with a force of 120 N. The small piston is connected through oil to a large piston of area 0.16 m^2. Calculate the upward force on the large piston.
Type your answer (in N) in the lesson.
3. In a hydraulic jack, the small piston has an area of 5 cm^2 and is pushed down by 30 cm. The large piston has an area of 150 cm^2. How far does the large piston rise?
Type your answer (in cm) in the lesson.
4. The diameter of the output piston in a hydraulic press is made 3 times larger, while the input piston and input force stay the same. By what factor does the output force increase?
- A. 3
- B. 6
- C. 9
- D. 27
5. Which scientist's principle states that pressure applied to an enclosed liquid is transmitted undiminished in all directions?
Type your answer in the lesson.
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