A bicyclist of mass 80kg (including the bike) can coast down a 4 degree hill at a steady speed of 6.0 km/h. Pumping hard, the cyclist can descend the hill at 30 km/h. Using the same ower, at what speed can the cyclist climb the hill? Assume the force of friction is proportional to the square of the speed; that is, Ff = bv^2, where b is constant.(adsbygoogle = window.adsbygoogle || []).push({});

thanks...

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# Homework Help: Tough question- energy and momentum

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