A screw is an inclined plane wrapped in ridges (threads) around a cylinder. The distance between these ridges defines the pitch of the screw and this distance is how far the screw advances when it is turned once. The mechanical advantage of a screw is its circumference divided by the pitch.
A screw is most like which of the following other simple machines?
inclined plane |
|
block and tackle |
|
first-class lever |
|
wheel and axle |