## anonymous 4 years ago A bicyclist coasts down a 7 degree hill at a steady speed of 5.0m/s. Assuming a total mass of 75kg (bicycle plus rider), what must be the cyclist's power output to climb the same hill at the same speed?

The work going down equals the work going up, assuming no friction or air resistance. $W = m \cdot g \cdot \sin(\theta) \cdot \vec v$