Use the table to answer the question.

Question

Machine Output Work (J) Input Work (J)
A 750 1,500
B 1,000 4,000
C 450 600
D 3,000 5,000
Which machine has the highest efficiency?

(1 point)
Responses

machine B
machine B

machine D
machine D

machine A
machine A

machine C
machine C
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Answer 1

The efficiency of a machine is determined by the ratio of output work to input work.

For machine A, the efficiency is 750 J / 1,500 J = 0.5 or 50%.
For machine B, the efficiency is 1,000 J / 4,000 J = 0.25 or 25%.
For machine C, the efficiency is 450 J / 600 J = 0.75 or 75%.
For machine D, the efficiency is 3,000 J / 5,000 J = 0.6 or 60%.

From this analysis, we can see that machine C has the highest efficiency with 75%.