What is the efficiency of a ramp that is 5.5 m long when used to move a 66 kg object to a height of 110 cm when the object is pushed by a 15

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What is the efficiency of a ramp that is 5.5 m long when used to move a 66 kg object to a height of 110 cm when the object is pushed by a 150 N force .

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Kim Chi 2 days 2021-07-21T23:40:34+00:00 1 Answers 0 views 0

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    2021-07-21T23:41:55+00:00

    Explanation:

    Energy input = F×d = (150 N)(5.5 m) = 825 J

    Energy output = mgh = (66 kg)(9.8 m/s^2)(1.10 m) = 711 J

    efficiency = \dfrac{\text{output}}{\text{input}}×100% = 86.2%

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