Originally Posted by
YWoodman
In exactly the same way as you cannot push a car forward by pushing at the steering wheels, you cannot push a bicycle forward by pushing at the handle-bars. Period. All notions to the contrary are erroneous.
Instead of reinventing physics, you should try it for yourself and see first hand.
Easiest to see the effect when doing a trackstand, or rolling at just 1-2 mph.
Same effect can be seen on a skateboard. By moving body weight, you can get the skateboard to move back and forth a little bit.
Every Action has an Equal and Opposite Reaction - This is the third of Sir Issac Newton's laws of physics
http://www.qrg.northwestern.edu/proj...-opposite.html