The wheel and axle is a simple machine
consisting of a circular object called a wheel and a shaft known as an
axle, which is attached to the wheel. All simple machines change the
amount of effort needed to work and are the basis for all other
machines, according to Mediahex. Two examples of a wheel and axle are a
doorknob and a round water facet. In a doorknob, a larger handle turns a
much smaller axle to move the door latch. In addition, a faucet has a
larger handle that turns a much smaller axle to open a water valve.
Another example of a wheel and axle is a car steering wheel, where the
driver exerts a force on the outer edge of the wheel to cause the front
wheels to turn..
