Well i really don't know but my guy pal did his science fair project on "which skateboard is the most accurate".. now, my school DID allowe him to do that so ur school probably will too. Althought take in mind that you could choose another project that could give you and easier "A"..well hope this helps u..
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because the friction the wheels hitting the ground , how the angle of the road / street / etc . monitors how fast you can go , the whole machinery of it .. like how it has a wheel and axle .. well there are a lot of things ..