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The Top 10 COOLEST TECHNO TOYS in the World!

August 19, 2011

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There is a lot of maths in toys, mathspigs. Just look at the equation for AERODYNAMIC DRAG (below). Scientists and engineers use equations like this to design techno toys.

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D = Drag Force [Newton] …………………………………………………………….

ρ = density of the fluid…………………………………………………………….

v  = velocity of plane or car.……………………………………………………………

A = front X-section Area of the car/plane (A can be a simple X-section Area or a more complex surface area depending on the design.)………………………

C= drag coefficient  (A constant determined by experiment)

Passenger car Cd = 0.30 – 0.35…………………………………………………………….

SUV Cd = 0.35 – 0.45 (Flat front)………………………………………………..

Sport cars Cd  = 0.25…………………………………………………………….

Toyota Prius 2004 Hybrid Cd = 0.26   ………………………………………………….

Toyota Prius 2004 Hybrid

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Area (A) for Prius

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Drag D Vs Speed or velocity v

As drag increases with the square of velocity, you can see from the graph how quickly it increases for any object.

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More info at the fabulous QUANTIFY website.

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Here are the Top 10 COOLEST TECHNO TOYS

in the world!

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