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Pressure = force ÷ area

7th grade (Year 8 in England) · 16 questions · Common Core: NGSS.MS-PS2-2 · England: KS3 Physics: Motion and forces (pressure), GCSE Physics: Forces (pressure)

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1
Question 1
Why does a sharp knife cut more easily than a blunt one?
- A. Sharp knives are heavier
- B. Blunt knives have less friction
- C. Sharp knives are magnetic
- D. The small edge area gives a much higher pressure for the same force
Question 2
An elephant has a weight of 50000 N. The total area in contact with the ground is 0.2 m². What pressure is exerted on the ground, in Pa?
AnswerPa
Question 3
A force of 20 N acts on an area of 4 m². What is the pressure, in pascals (Pa)?
AnswerPa
4
Question 4
Why do snowshoes stop you sinking into deep snow?
- A. They spread your weight over a larger area, reducing pressure
- B. They increase the pressure
- C. They make you lighter
- D. They melt the snow
Question 5
An elephant has a weight of 50000 N. The total area in contact with the ground is 0.2 m². What pressure is exerted on the ground, in Pa?
AnswerPa
Question 6
A force of 80 N acts on an area of 20 m². What is the pressure, in pascals (Pa)?
AnswerPa
7
Question 7
Why are deep-sea submersibles built with very thick walls?
- A. Water pressure increases greatly with depth
- B. Deep water is hotter
- C. There is no pressure deep down
- D. To make them float
Question 8
A car has a weight of 12000 N. The total area in contact with the ground is 0.08 m². What pressure is exerted on the ground, in Pa?
AnswerPa
Question 9
A force of 4 N acts on an area of 0.5 m². What is the pressure, in pascals (Pa)?
AnswerPa
10
Question 10
Why does a sharp knife cut more easily than a blunt one?
- A. Blunt knives have less friction
- B. Sharp knives are heavier
- C. The small edge area gives a much higher pressure for the same force
- D. Sharp knives are magnetic
Question 11
A walker has a weight of 600 N. The total area in contact with the ground is 0.04 m². What pressure is exerted on the ground, in Pa?
AnswerPa
Question 12
A force of 5 N acts on an area of 0.5 m². What is the pressure, in pascals (Pa)?
AnswerPa
13
Question 13
Why are deep-sea submersibles built with very thick walls?
- A. Deep water is hotter
- B. There is no pressure deep down
- C. To make them float
- D. Water pressure increases greatly with depth
Question 14
An elephant has a weight of 50000 N. The total area in contact with the ground is 0.2 m². What pressure is exerted on the ground, in Pa?
AnswerPa
Question 15
A force of 80 N acts on an area of 10 m². What is the pressure, in pascals (Pa)?
AnswerPa
16
Question 16
Why do snowshoes stop you sinking into deep snow?
- A. They make you lighter
- B. They increase the pressure
- C. They melt the snow
- D. They spread your weight over a larger area, reducing pressure

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Answer key: Pressure = force ÷ area

1. D. The small edge area gives a much higher pressure for the same force
2. 250000 Pa
3. 5 Pa
4. A. They spread your weight over a larger area, reducing pressure
5. 250000 Pa
6. 4 Pa
7. A. Water pressure increases greatly with depth
8. 150000 Pa
9. 8 Pa
10. C. The small edge area gives a much higher pressure for the same force
11. 15000 Pa
12. 10 Pa
13. D. Water pressure increases greatly with depth
14. 250000 Pa
15. 8 Pa
16. D. They spread your weight over a larger area, reducing pressure