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Which of the following statements is true? Efficiency is calculated by multiplying work input and work output. Only a few machines are 100 percent efficient. Some machines are frictionless. The ratio of
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Which of the following statements is true?

Efficiency is calculated by multiplying work input and work output.
Only a few machines are 100 percent efficient.
Some machines are frictionless.
The ratio of work output to work input is always less than one.

User ShreeshaDas
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Answer:

The ratio of work output to work input is always less than one.

User Michal Minich
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10 votes
its d!!!!!!!!!!!!!!!!
User Albee
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