Question

Choose the correct one from the following.

• A. A simple machine is a device that changes the direction or magnitude of a force.
• B. A simple machine is a device that changes the magnitude of a force.
• C. A simple machine is a device that increases human efforts.
• D. A simple machine is a device that always maintains the magnitude of a force.

Answer 1

The correct option is A

A simple machine is a device that changes the direction or magnitude of a force.

As per the definition of simple machines, a machine is a mechanical device that changes the direction or magnitude of an applied force which is also known as an effort.