The resistance of an exercise bike is often provided by a generator; that is, th
ID: 1980812 • Letter: T
Question
The resistance of an exercise bike is often provided by a generator; that is, the energy that you expend is used to generate electric energy, which is then dissipated. Rather than dissipate the energy, it could be used for practical purposes.A typical person can maintain a steady energy expenditure of 400 on a bicycle.
a) Assuming a typical efficiency for the body and a generator that is 80% efficient, what useful electric power could you produce with a bicycle-powered generator?
b) How many people would need to ride bicycle generators simultaneously to power a 400 TV in the gym?
Explanation / Answer
Typical efficiency for body not given so assume as 25 %
A)
400 * 0.25 * 0.85 = 85 W ---- > Answer
B)
255 / 85 = 3 persons ---- > Answer