Adam Bede and Steven Arterbery
Examples of the Screw
The screw provides mechanical advantage by turning rotary motion into linear motion. A screw allows the energy required to drive the screw to be spread out over time rather than all at once. This can make the work seem easier. To calculate the mechanical advantage of a screw you need to find the circumference of the screw (diameter multiplied by Pi) and the pitch of its threading (length between the screw's thread). The length between the screw's threads is calculated by counting the number of threads in an inch then dividing it by the total number of threads. To get the mechanical advantage, divide the circumference by the pitch.