kwakyetheresa7 kwakyetheresa7

05-02-2022
Physics

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A machine has a velocity ratio of 6 and is 80%efficient. What effort would be needed to lift a load of 300N with the aid of this machine?

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smartbrain91 smartbrain91

05-02-2022

Efficiency =Velocity Ratio/Mechanical Advantage *100%

80%=6/MA*100%
Therefore MA=7.5

MA=Load/Effort
7.5=300/E
E=300/7.5
E=40

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