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saul85 [17]
3 years ago
10

The record time for a Tour de France cyclist to ascend the 1100-m-high Alpe d'Huez is 37.5 min. The rider and his bike had a mas

s of 65 kg. At the average speed of the ride, the metabolic power to ride on level ground would be 700 W. To this, we must add the power to make the climb.
Physics
2 answers:
Leni [432]3 years ago
8 0

Answer

given,

height of Alpe d'Huez =  1100-m

time = 37.5 min

mass of the rider and his bike = 65 Kg

the metabolic power to ride = 700 W

U = m g y

U = 65 x 9.8 x 1100

U = 700700 J

since efficiency is 25%

E_{chem} = \dfrac{U}{e}

E_{chem} = \dfrac{700700}{0.25}

E_{chem} = 2802800

E_{chem} = \dfrac{2802800}{4.19 \time 10^3}

E_{chem} =668.9\ cal

b) P = \dfrac{E_{chem}}{t}

P = \dfrac{2802800}{37.5\times 60\ s}

P = 1245.68 W

boyakko [2]3 years ago
5 0

the above answer is close but you need to add it to 700W. Mastering Phys has it at 1900W

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