Pressure in liquids and gases
2 marks · EasyA block has a mass of 10 kg and is placed on the ground, covering an area of 0.02 m². Calculate the pressure the block exerts on the ground. (Take gravitational field strength ).
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5000 Pa (±1)
Common mistakes: Forgetting to multiply by g (using mass instead of force)
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Marking points
M1 · 1 mark · Calculates force correctly, F = m × g = 10 × 10 = 100 N
A1 · 1 mark · Substitutes correctly in p = F/A and evaluates: 100/0.02 = 5000 Pa
Worked solution
Calculate force:
Calculate pressure: