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Physics - Forces Shortened (Elastic (k = spring constant (N/m), F = force…
Physics - Forces Shortened
Forces
Arrow
Direction - angle
Size of force - length
Newtons (N)
Force diagrams
Balanced & Unbalanced
If equal and opposite - Balanced
Anything else - Unbalanced
Floating/sinking
Object's density and fluids density
Fluid's density higher - float
Fluid's density lower - sink
Resultant Force
Biggest force - smallest force
Pythagoras' theorem for diagonals
Trigonometry for diagonals
Friction
Drag - particles hitting surface
2 surfaces rubbing
Stops things moving
Water resistance - water particles hitting surface
Elastic
Force proportional to extension
F = ke
k = spring constant
N/m
F = force
N
e = extension
m
Turning forces/moments
M = Fd
M = moment
Nm
F = force
N
d = perpendicular distance form pivot to force applied
m
Centripetal forces
Swing an object on a string the string will stay taught
Earth and Moon
Earth's gravity and Moon's velocity
Mass/weight
Density
g/cm3
Volume = mass/density
Weight = mass*gravity