Lever a+
Lever a+
Lever a+
Lever a+
wheel and axle
wheel and axle
wheel and axle
Lever a+
pulley
A doorknob is a type of wheel and axle simple machine. It allows a person to apply force at the outer edge (wheel) to turn the central shaft (axle) which operates the latch mechanism to open or close the door.
Axle
That simple machine is a lever. It allows for the turning of the wheel by applying force at a greater distance from the wheel's center, providing mechanical advantage.
A screwdriver is a type of simple machine known as a wheel and axle. The handle of the screwdriver acts as the wheel, while the shaft of the screwdriver acts as the axle. This design allows for the application of rotational force to drive screws into a surface.