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AS P1 Topics
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Mind Map on AS P1 Topics, created by ssheldrake on 17/05/2013.
Mind Map by
ssheldrake
, updated more than 1 year ago
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ssheldrake
almost 11 years ago
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Resource summary
AS P1 Topics
Buoyancy
Buoyancy occurs due to density of solid < density of liquid
Upthrust = Weight + Drag
4/3 π r^3 ρ (fluid) = M(sphere) g + 6π η r v
Sinking occurs due to density of solid > density of liquid
M(sphere) g = 4/3 π r^3 ρ (fluid) + 6π η r v
Weight = Upthrust + Drag
Density = Mass of material for given volume: Kg/m^3
Mass = Density x Volume
Volume = Mass / Density
For terminal velocity, F=ma = 0
Can determine the viscosity using this!
Stoke's law (viscous drag) = 6π η r v
Boats
Resolution of vectors
Trigonometry
Sin(theta) = Opposite/Hypotenuse
Cos(theta) = Adjacent/Hypotenuse
Tan(theta) = Opposite/Adjacent
Pythagoras
C^2 = A^2 + B^2
Vectors can be resolved to horizontal and vertical forces
Materials
Hooke's law
F = -k x
Young modulus
Elastic region: The linear part of a stress-strain graph. If a material is deformed in this area it will go back to its original dimensions
Plastic region: The area where non-linear behaviour is seen on stress-strain graph. If this occurs then the material will remain deformed
Brittle: Very small region of plastic deformation before mechanical failure
Ductile: Can be drawn into wires
Malleable: Can be beaten into sheets and deformed
Friction
Resolution of vectors
Projectile Motion
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