# Physics Formulas

KS3 physics, formlas, equations and some examples. Great to stick on your wall :)

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• Created by: Hayer-28
• Created on: 28-04-12 14:11

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Hydraulics Pressure = Force
Area
a) calculate pressure P= F = 20 = 4N/cm2
force - N
A 5
area m2
pressure - PASCALS = 1N/m2
Next -
20 N
Force= P x A Small force Large force
applied here produced here
= 4 x 60
=240 N Area= Area=
Effort
5cm2 60cm2
The further away from the pivot
you apply the force the easier it
is to turn the lever. A lever is a
simple machine that uses a
Diving bell... pivot. A pivot is a point around
Liquid cannot be squashed because which something turns. The
width of the thing acts as a
long lever making it easier.
gets transmitted to all parts of a
liquid.Pressure compresses the air,
the water gets squashed and the Time = x axis velocity = speed
tube sinks to the bottom. when
released it floats back up because D
the air goes into it and the
water has more room to spread. SxT
Force = pressure x Variables
area eg. 3n/m x 4m = 12N Independent - something you can change
Dependent- changes for you to measure
Control- something you keep the same
Moments Accelerate
The turning effect of a force is called the
moment.The size of the moment is given Decelerate
by : Moment(Nm) = Force(N) x Stationary
Distance from Pivot(M) Constant speed
F1
Resultant force
D1 D2 F2
If F2 x D2 = F1 x D1 then it balances!