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A racetrack has the shape of an inverted cone, as the drawing shows. On this surface...

A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle θ = 30°. For a speed of 44 m/s, at what value of the distance d should a driver locate his car if he wishes to stay on a circular path without depending on friction?

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