Question

An elite Tour de France cyclist can maintain an output power of 470 W during a sustained climb. At this output power, how long would it take an 84 kg cyclist (including the mass of his bike) to climb the famed 1100-m-high Alpe d'Huez mountain stage? Neglect any friction.

Answer 1

solution : Pcyclist =p=470w halloon Magclist tbike = 84kg . Yicom ype 1100 m power (P) = Da che hot = Fr Because the cyclist in going up to the top of the mountain, the change in his energy will be in the gravitational potential energy energy. - This means that we are supposing the he is moving as a constent speed, because he can maintain an output power of unitow during a sustained climba Pabe upg-Uigmgyf-ing Yi OK OL potamgyf-nghi The initial altitude u zero 9,20 (ground Pota ong Yg - mga potangYg Dt: mg If 84 x 9.01411100 470 • level At 1928.604255 sec. Lot 32.14340426 min