Question

goggles
any tool that uses one or more simple machines
stay safe! always wear your safety goggles. be careful while handling sharp objects.
part a
choose a tool or a device you can investigate. it must not have any source of power other than the person using it. it must use one or more of the six simple machines. explain how the tool or device is used. what work does a person do while using it? what kind of motion do we see when its used?

Explanation:

Let's choose a pair of scissors as the tool. Scissors use two levers (the handles) and two wedges (the blades). To use scissors, a person applies a force on the handles to bring the blades together. The work done is in the form of applying the force to cut through an object. When used, we see a rotational - like motion of the handles around the pivot point and a linear - like cutting motion of the blades.

Answer:

A pair of scissors is a tool that uses two levers and two wedges. A person applies force on the handles to cut. The motion includes rotational movement of handles and linear cutting motion of blades.