Question

Bill does 1500 j of work on a leaver, which is a simple machine. The lever does 1350 j of work on a stone. What is the efficiency of the leaver?

Answer 1

The correct answer is:

C. 90%

The efficiency of the lever is 90%.

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Answer 2

c) 90% is the efficiency of the leaver.

Efficiency is the energy output, divided by the energy input, and expressed as a percentage.

Efficiency = (1350/1500)×100

               = 90%

What is the formula for efficiency?

Efficiency may be expressed as a ratio by using the following components: Output ÷ input. Output, or painting output, is the overall amount of useful work finished without accounting for any waste and spoilage. You can also express performance as a percentage by using multiplying the ratio by using one hundred.

A second class lever is the handiest lever which can promise that the attempt arm will usually be more extra than the load arm. This arrangement results in a larger attempt arm-to-load arm ratio, making the second magnificence lever the maximum robotically high-quality.

The question is incomplete. Please read below to find the missing content.

Bill does 1500 J of work on a lever, which is a simple machine. The lever does 1350 J of work on a stone.

What is the efficiency of the lever?

a)0.9%

b)1.1%

c)90%

d)111%

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