Question

To move a box up an inclined plane, a woman expends 200 J of work, but the amount of work produced is 70 J. What is the efficiency of the work performed?

A. 15%
B. 25%
C. 35%
D. 45%

Answer 1

The efficiency of moving a box up an inclined plane is calculated by the ratio of work output to work input, multiplied by 100 to get a percentage. In this case, the efficiency is 35%, so the correct answer is C. 35%.

Step-by-step explanation:

The efficiency of work performed is calculated by dividing the work output by the work input and then multiplying the result by 100 to get a percentage. In this case, the efficiency is:

Efficiency (%) = (Work output / Work input) × 100

Efficiency (%) = (70 J / 200 J) × 100

Efficiency (%) = 0.35 × 100

Efficiency (%) = 35%

Therefore, the correct answer is C. 35%.