Question

Which statement best describes why a machine is useful?

A machine does a greater amount of work than the amount of work that is done on it.
A machine does a smaller amount of work than the amount of work that is done on it.
A machine can decrease banka the input force and the input distance needed to do a given amount of work.
A machine can decrease either the input force or the input distance needed to do a given amount of work.
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Answer 1

The answer is D) A machine can decrease either the input force or the input distance needed to do a given amount of work.

Step-by-step explanation:

Answers to Lesson 2: Introduction to Machines

1. D) A machine can decrease either the input force or the input distance needed to do a given amount of work.

2. D) It allows a smaller force to be applied over a longer distance.

3. B) 2

4. B) 1

5. D) 83%

6. D) 400 m

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Answer 2

machine can decrease banka the input force and the input distance needed to do a given amount of work.