Question

A screw can convert a rotational force into linear force. Justify.

Answer 1

Hint: From the beginning of history, humans have created various devices to make work simple. The most remarkable of devices are known as the "six simple machines". The six simple machines are the wheel and axle, the lever, the inclined plane, the pulley, the screw and the wedge.

Complete step by step answer:
Screw is a mechanical system which refers to a spiral device. Its simple form consists of spiral threads around a cylindrical shaft which has a male-external thread and the objective of the screw is to secure components together. One of the components that is to be secured together contains an internal/female thread and this may be set up during the fitting of the screws. This differs from the definition of a bolt which is a similarly threaded component used to secure an un-threaded component together with the help of a nut. In both cases, rotation of the threaded component, through the application of torque, results in relative movement between it and the female thread and the screw/bolt moves along its axis. A screw is one of the six simple machines of mechanical systems that can transform rotationally, that is it can transform torque into linear motion, that is it is a motion that travels in a one-dimensional straight line. The linear motion is also known as rectilinear motion.

Therefore, a screw can convert a rotational into linear force.

Note: Like any other simple machines a screw can increase the force. A small rotational force that is torque on the shaft of the screw can apply a large axial force on the load. The smaller the pitch that is the interval between the thread of the screws, the mechanical advantage that is the ratio of output force to input force will be greater.