Grade 10 Physics · Strand 1: Mechanics and Thermal Physics · Pressure
Introduction to Pressure and Solid Pressure
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. A sharp needle enters cloth much more easily than a blunt knitting needle pushed with the same force. What is the reason?
- A. The sharp tip has a smaller contact area, so it produces a higher pressure
- B. The sharp needle exerts a larger force on the cloth
- C. The cloth becomes softer when touched by a narrow tip
- D. The sharp needle removes all friction
2. A metal block exerts a downward force of 500 N on a table. Its base has a contact area of 0.05 m^2. Calculate the pressure it exerts on the table.
Type your answer (in Pa) in the lesson.
3. A concrete block of mass 12 kg has dimensions 0.4 m × 0.2 m × 0.1 m. Taking g = 10 N/kg, calculate the maximum pressure it can exert on a bench.
Type your answer (in Pa) in the lesson.
4. A pupil has a contact area of 250 cm^2. What is this area in m^2?
- A. 0.025 m^2
- B. 2.5 m^2
- C. 0.25 m^2
- D. 2500 m^2
5. What is the name of the SI unit of pressure, equal to one newton per square metre?
Type your answer in the lesson.
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