# science year 8 physics

what controlls aeroplanes ?
ailerons.
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what is air resistance ?
air resistance - a force that tries to slow things down that are moving through air.
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what is drag ?
drag - another name for air or water resistance.
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what is the equation for speed ?
equation for speed - distance over time.
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what is the equation for acceleration ?
equation for acceleration - change in speed over time.
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what is another equation to calculate acceleration ?
equation for acceleration - force over mass.
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what is the equation for mass ?
equation for mass - force over acceleration.
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what is the equation for force ?
equation for force - mass times acceleration.
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what is the equation for pressure ?
equation for pressure - force over area
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what is force measured in ?
newtons : N
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what is area measured in ?
cm/m squared
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what is pressure measured in ?
N/M squared also called a PASCAL (pa)
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how is pressure caused ?
pressure is caused by tiny particles hitting against eachother.
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what is a menometer ?
a menometer - a U shaped tube filled with liquid
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the weight of the liquid inside a tube is measured how ?
by using the formula F = P x G x A x H
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what does the F stand for in that equation ?
F = weight (in newtons)
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what does the A stand for in that equation ?
A = cross sectional area in a tube (newtons)
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what does H stand for in that equation ?
H = height difference in the liquid (cm/m squared)
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what does the P stand for in that equation ?
P = density of the liquid (kg/m cubed)
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what does the G stand for in that equation ?
G = force of gravity
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what measures pressure ?
a Barometer.
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## Other cards in this set

### Card 2

#### Front

what is air resistance ?

#### Back

air resistance - a force that tries to slow things down that are moving through air.

### Card 3

what is drag ?

#### Back ### Card 4

#### Front

what is the equation for speed ?

#### Back ### Card 5

#### Front

what is the equation for acceleration ?

#### Back ## Comments

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