P11 - Force and Pressure (PAPER 2) Flashcards

1
Q

What is the formula for pressure

A

pressure = Force / Area

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2
Q

What is the unit for pressure

A

Pascal (pa)
1 Pa = 1 N/m^2

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3
Q

What is the correlation between pressure in a liquid and its depth

A

the higher the liquid depth, the more pressure

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4
Q

The pressure along a horizontal line in a liquid is ___

A

constant

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5
Q

what is the correlation between density and pressure in a liquid

A

the greater the density, the greater the pressure

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6
Q

What is the formula for pressure in a liquid

A

pressure = depth x liquid density x gravitational field sterngth

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7
Q

what is the approximate force on a square metre of surface at sea level

A

≈100 000N

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8
Q

What is the correlation between altitude and pressure

A

the higher the altitude, the less pressure

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9
Q

What is upthrust on an object

A

an upward force on the object caused by the pressure of the liquid

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10
Q

What condition makes an object float

A

when its weight is less than the upthrust on it when it is fully immersed

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