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GCSE Physics

GCSE Physics Flash Card Questions

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P11 Force and pressure

P11.1 Pressure and surfaces (single science only)

Question	Answer
What is pressure?	pressure is caused when a force acts on an area
What are the factors that determine the size of the pressure?	the magnitude of the force and the size of the contact area
What is the word formula for pressure?	\( \text {pressure} = \frac{\text {force}}{\text {area}} \)
What is the symbolformula for pressure?	\( \text {p} = \frac{\text {F}}{\text {A}} \)
What are the units of pressure?	pascals (Pa)
What units are pascals equivalent to?	newtons per square metre (N/m2)
What is the definition of pressure?	pressure is the force per unit area
Why are caterpillar tracks used on some vehicles?	caterpillar tracks increase the contract area so reducing the pressure of the vehicle due to the weight on the ground
What are kiloPascals and MegaPascals?	• 1 kiloPascal = 1 kPa = 103 Pa = 1 000 Pa • 1 MegaPascal = MPa is 106 Pa = 1 000 000 Pa
Why does a sharp knife cut easier than a blunt knife?	the contact area of the sharp knife is less than the blunt knife so the sharp knife exerts more pressure enable it to cut easier with the same force

P11 Force and pressure

P11.2 Pressure in a liquid at rest (single science only)

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P11 Force and pressure

P11.3 Atmospheric pressure (single science only)

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P11 Force and pressure

P11.4 Upthrust and flotation (single science only)

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