+ More. The oldest baby boomers have already turned 65, and the older population of the U.S. is beginning to swell. The age-65-and-older population grew 18 percent between 2000 and 2011 to 41.4 million senior citizens, according to a recent Administration on Aging report. More. The oldest baby boomers have already turned 65, and the older population of the U.S. is beginning to swell. The age-65-and-older population grew 18 percent between 2000 and 2011 to 41.4 million senior citizens, according to a recent Administration on Aging report.
Community Q&A. An electric bicycle can easily be built by taking an existing bicycle and adding five parts: 1) a motor, 2) a linkage from the motor to a wheel or pedals, 3) batteries, 4) a throttle and 5) a motor controller (the brain that regulates how much battery power to send to the motor based on the position of the throttle).
History of the bicycle. Vehicles for human transport that have two wheels and require balancing by the rider date back to the early 19th century. The first means of transport making use of two wheels arranged consecutively, and thus the archetype of the bicycle, was the German draisine dating back to 1817. The term bicycle was coined in France in the 1860s.