Both the bicycle and the toy car have wheel and axle mechanisms that help them to move. So, how does this work? A wheel moves forward by rolling in a circle, using circular motion. Whoops!

His solution to balancing the bicycle was a reaction wheel that keeps the bicycle upright at all times. A bicycle is basically an inverted pendulum; something we’ve seen controlled in a number ...

They were perforated in the middle, leading scientists to believe that they were spindle whorls — circular weighted objects that attach to a spindle stick, forming the classic wheel-and-axle ...

He demonstrated this by splitting the rear wheel of his bike first in half and then thirds to create an absolute head turner. Since a conventional bicycle wheel with tensioned spokes would ...