We here at PopSci were a bit skeptical about just how much energy could be generated by one bike, so we did the math. Theoretically, let's take a 10-kilogram bike that has an average speed of 10 meters per second. Using some basic physics, it turns out the amount of kinetic energy generated in one second would be 500 joules. Not bad. However, that is assuming that the capacitors in the bike are 100 percent efficient and capture every bit of energy (which isn't possible), and that no energy is lost due to heat and other factors. If all the energy was captured, it would be the equivalent of 1/100th of a gram of combusted gasoline in a normal bus. If you had a legion of these bikes generating power, the harnessed energy could be fairly significant.