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17 May, 16:55

Tracy pushes a block up an inclined plane to a height of 1.0 m.

If Tracy puts 475 J of work into the system, but only 450 J are used to elevate the block, what is the efficiency of the inclined plane?

A. 95%

B. 106%

c. 925)

OD 25 J

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Answers (1)
  1. 17 May, 17:14
    0
    A=95%

    (450/475) * 100=94.7% which rounds to 95%
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