Question

Shaina uses a shovel to dig a hole to plant a tree. A shovel is an example of a compound machine because it is made up of what two simple machines?

Answer 1

A shovel is a compound machine comprising of a lever (the handle) and a wedge (the blade) that work together to reduce the input force required for digging.

Step-by-step explanation:

A shovel is an example of a compound machine because it is made up of at least two different types of simple machines: a lever and a wedge. The handle of the shovel acts as a lever, where the point where your foot applies pressure serves as the fulcrum, the effort is the force you apply with your arms, and the resistance is the soil being lifted or moved. The shovel's blade is a wedge, which is essentially two inclined planes back to back, helping to break ground and lift the material. The Mechanical Advantage (MA) of these simple machines helps to reduce the input force required to perform the job.

Answer 2

Machines can be classified into two categories: Simple and Compound

A simple machine is a basic device used for applying a force to produce a certain outcome. for example: lever, wedge, inclined plane are all simple machines.

A compound machine is a combination of simple machines.

In the given example: Shovel is a compound machine which is a combination of wedge and lever.