1. The Tour de France bicycle race has been called the most grueling physical competition in the world. For example, the average power generated per kilogram of body mass by a rider is 6.50 watts.If a rider has a mass of 75.0 kg, a. How much work does he do during a 135 km race which has an average speed of 12.0 m/s? b. How many food calories will the rider need to eat to fuel his body during the race?Keep in mind that human muscles are only about 25% efficient.
2. A particular rain cloud is located 1.75 km above the ground. It contains 3.20 x 10⁷ kg of water vapor. How many years would it take for a 2.70 kw water pump to raise the same amount of water to the same height? (To put this in perspective 2.70 kw is about the power consumption of a typical medium sized family home.)