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Physics

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Which of the following is NOT a means to determine the efficiency of a machine? A) useful work output/work input B) useful power output/power input C) effort x distance moved by effort/load distance moved by load D) load x distance moved by load/effort x distance moved by effort

Answer :

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In general terms, efficiency is output/input.

For a lever, the effort is the input and load is the output.

Thus, option C is not a means to determine efficiency as effort is the input and load is the output.

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