Which simple machine consists of a larger wheel rigidly attached to a smaller rod, or axle, so that both rotate together, such as in a doorknob or a car’s steering wheel?

Explanation

A wheel and axle is a simple machine consisting of a larger wheel rigidly attached to a smaller central rod, called an axle, so that both components rotate together as a single unit, allowing a relatively small force applied at the larger wheel to produce a greater force at the smaller axle, or vice versa. Common everyday examples include a doorknob, a car’s steering wheel, and a screwdriver, all of which use this basic mechanical principle to make certain tasks considerably easier to perform. This simple machine essentially provides a practical mechanical advantage by effectively acting as a continuously rotating form of lever. Explore more Everyday Science MCQs on mcqstutor to keep practicing.