Justin Li


Efficient Transportation

2009-02-09

Last week's question: Are outdoor ice rinks really made with water? Is Zamboni a type of vehicle or a brand name?

This week's question: In physics, we often do problems where the ground has no friction, so there is no loss in energy. Now, imagine a world where the ground (and only the ground, not buildings or other artificial objects) have no friction. What would the transportation system in such a world look like? Hint: cars move because of friction between the tyres and the ground.

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