Page 13 - SIMPLE MACHINES

6. WHEEL AND AXLE –

 Wheel as such is not a machine by itself but becomes a machine when a rod called an
axle is attached to it. Together, the wheel and the axle make a simple machine. When
the wheel is rotated, the axle also rotates along with it.
 We can see such an arrangement in cars, sewing machines, doorknob, bicycles, the
potter’s wheel etc.

Steering wheel of car

Doorknob

Bicycle