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Defined as how much energy it takes to perform a specific amount of work.

A.) Machine
B.) Friction
C.) Efficiency
D.) Mechanical Advantage

User Tim Penner
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2 Answers

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Defined as how much energy it takes to perform a specific amount of work.

B. Friction
User Bizzz
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I think the best answer from the choices listed above is option B. Friction force is defined as how much energy it takes to perform a specific amount of work since it is the only force among the choices listed above. Hope this answers the question.
User Loosebazooka
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