101 uses of a quadratic equation Chris Budd
101 uses of a quadratic equation Chris Budd
Is the quadratic equation evil? And does anyone care?
Babylonians Counted in Base 60
x Area x x
Quadratic equation Solutions
X = 1. 4142135623730950488… A 4 Paper
Conic sections Appolonius Cone
Ellipse
Parabola
Hyperbola
Ellipse Parabola Hyperbola All these curves obey quadratic equations
How conic sections caused a revolution
Copernicus
Tycho Brahe Kepler
Galileo Studied how things move and found that they obeyed quadratic equations
Cars do …. . THUD!! . . Was the car speeding? Forensic evidence: collision damage, witness statements, skid marks
s u F distance of skid speed brake force Quadratic equation links them together Solving the equation gives the speed
So do rugby balls …. Parabola
Sir Isaac Newton Explained the link and also invented the reflecting telescope based on the parabola
Newton discovered differential equations Used to explain almost everything • Pendulums • Car suspensions • Musical instruments • Radios and TV
Euler finds the solution Solve the quadratic equation to solve the differential equation And millions of important problems
Quadratic equations take flight Speed Pressure Bernouilli
Chaotic quadratic equations Bee population x evolves every year
population a=2 Population settles down
population a=3 Boom and bust
population a=4 Chaos
Are you still frightened of me?
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