25 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m, then the load is lifted to 3 m , the efficiency of pulley system will be:

90%

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25%

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75%

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33.3%

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Solution

The correct option is C
75%

Efficiency = output/input = (75x3) / (25x12)
=75/100 =75%

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Similar questions

250 N

force is required to raise

75 k g

mass from a pulley. If rope is pulled

12 m

then the load is lifted to

3 m

, the efficiency of pulley system will be:

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, the rope has to be pulled through

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25 N force is required to raise 75 kg mass from a pulley. If rope is pulled 12 m, then the load is lifted to 3 m , the efficiency of pulley system will be:

The correct option is C 75% Efficiency = output/input = (75x3) / (25x12) =75/100 =75%

The correct option is C
75%

Efficiency = output/input = (75x3) / (25x12)
=75/100 =75%