Grade 10 Physics · Strand 1: Mechanics and Thermal Physics · Pressure
The Fluid Pressure Formula
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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5 questions from this lesson’s quiz. Start the lesson to answer them and see the right answers.
1. In the equation P = \rho g h for liquid pressure, what does the symbol \rho represent?
- A. The cross-sectional area of the container
- B. The density of the liquid
- C. The total mass of the liquid
- D. The depth below the surface
2. A water tank in Nakuru holds water of density 1000 kg/m^3 to a depth of 6 m. Taking g = 10 N/kg, calculate the pressure of the water at the base of the tank.
Type your answer (in Pa) in the lesson.
3. A domestic water tank in Eldoret is filled with water of density 1000 kg/m^3 to a depth of 4 m. The atmospheric pressure is 100 000 Pa. Taking g = 10 N/kg, calculate the total pressure at the base tap.
Type your answer (in Pa) in the lesson.
4. Two containers, one wide and one narrow, are both filled with water to the same depth of 2 m. How does the pressure at the base of each container compare?
- A. The wide container has the greater pressure
- B. The narrow container has the greater pressure
- C. The pressures are equal
- D. It depends on the total mass of water in each
5. Mercury has a density of 13 600 kg/m^3 and fresh water has a density of 1000 kg/m^3. At the same depth, how does the pressure in mercury compare with the pressure in water?
- A. It is 13.6 times greater
- B. It is 13.6 times smaller
- C. It is the same
- D. It is 136 times greater
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