What is the definition of screw in science?

Answer 1

In science, a screw is a type of simple machine that converts rotational motion into linear motion. It consists of a cylindrical shaft with a helical ridge, or thread, wrapped around it, allowing it to be driven into a material when turned. This mechanism is often used to fasten objects together or lift materials, as the helical structure provides mechanical advantage. Screws are fundamental in various applications, from construction to machinery.