Question

4. Write the answers to the following
questions in your own words.
(a) What is meant by simple
machines ?
(b) Mention the advantages of using
a machine.
(c) What is meant by complex
machines?
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Answer 1

Answer:

there are the definition of all the topic related to your questions.

Explanation:

1-Any of the basic mechanical devices applying a force such as inclined plane, wedge.is called simple machine. 2-Mechanical advantage: the ratio of the load to the effort is called the mechanical advantage .it has no units, because mechanical advantage is the ratio of two similar quantities that's why it has no units.3-complex machine: is a machine made up of two or more simple machines that make your work easier to do.