BVG8Science - Dilan's Trivia on Mechanical Efficiency Answers

Trivia Answers

1.c, A percent.

2.b, Gravity or c, Temperature depending on the machine, and a, Friction always.

3.b, 92%. You get the answer by using the formula ME = Wout/Win x 100%. By multiplying the force by the distance you get both Wout and Win.
Wout = 12N x 5.5m
Wout = 66J
Win = 3.5N x 20.5m
Win = 71.75J
ME = 66/71.75 x 100%
ME = 92%

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