Which of the following is NOT a simple machine?

A simple machine is a basic mechanical device that alters the direction or magnitude of a force, requiring only one movement to perform work. Simple machines include devices like inclined planes, levers, and wheel and axles, all of which can help in lifting or moving loads more efficiently.

An automobile, on the other hand, is not classified as a simple machine. It is a complex machine that consists of multiple interconnected simple machines and mechanical systems working together. While it utilizes components like gears (which are part of a wheel and axle), the automobile itself cannot be reduced to a single mechanical function without losing the complexity that defines its operation.

Thus, identifying the automobile as something other than a simple machine reflects an understanding of the definitions and examples of simple machines versus more complex mechanical systems.