Music boxes, bicycles, and clocks all have one thing in common: GEARS. You might say that gears make the world turn, since they are in so many mechanical instruments. How do they work and how do you know which gears to use? Find out in...

Are you a budding Lance Armstrong or Greg LeMond? Are you into cycling and speed? Then this is the science fair project for you. In this science fair project, you will determine the best gear ratio for your bike, to get the highest speed...

This poem describes the characteristics of an effective machine.