Question

A simple machine that consists of a rope that fits into a groove in a wheel

Answer 1

The simple machine you are describing is known as a **pulley**. A pulley consists of a wheel on an axle or shaft that is designed to support movement and change the direction of force using a rope or cable that fits into a groove around the wheel. Pulleys can be used to lift heavy objects more easily by distributing the weight and allowing the user to apply force in a more advantageous direction. They can be used individually or in combination to create more complex systems, such as block and tackle setups.