15-2: What is efficiency? Lesson

5 Slides • 3 Questions

1

15-2: What is efficiency?

2

Multiple Choice

REVIEW: If you apply a 50 N force to move something a distance of 2 m, what work did you do?

1

25 J

2

100 J

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0.04 J

3

4

5

6

Multiple Choice

Because of friction, which will always be higher?

1

Input Work

2

Output Work

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8

Multiple Choice

If you put 50 J of work into a machine and get 25 J of work out, what is your machine's efficiency?

1

50%

2

200%

3

75%

4

25%

15-2: What is efficiency?

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