A cyclist competes in a one-lap race around a flat, circular course of radius 14

Question

A cyclist competes in a one-lap race around a flat, circular course of radius 140 . Starting from rest and speeding up at a constant rate throughout the race, the cyclist covers the entire course in 60 . The mass of the bicycle (including the rider) is 76. What is the most appropriate set of coordinate systems? http://imageshack.us/photo/my-images/690/screenshot20121022at811.png/ Draw a free body diagram on the dot showing drag force and static friction force http://imageshack.us/photo/my-images/580/screenshot20121022at811.png/

Explanation / Answer

Distance traveled, D = 2pi r Constant tangental acceleration, At = 2D/T^2 Final speed, Vf = At*T Radial acceleration Ar = Ar = (Vf^2)/r Total acceleration A = root(At^2 + Ar^2) Net force, Fn = mA = _______ (to be filled in by student using above info)

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