A rider on a bike with the combined mass of 100 kg attains, Ask an Expert

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A rider on a bike with the combined mass of 100 kg attains a terminal speed of 15 m/s on a 12% slope. Assuming that the only forces affecting the speed are the weight and the drag, calculate the drag coefficient. The frontal area is 0.9 m². Speculate whether the rider is in the upright or racing position.

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