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Furniture weighs 1200N+pushed up ramp 4m long+1m high. Pushed with 400N. 12% efficiency correct?

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Furniture weighs 1200N+pushed up ramp 4m long+1m high. Pushed with 400N. 12% efficiency correct?

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  1. (1,200 N)(1/4) ≈ 300 N

    300/400 = 75/100 = 75%

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