A mechanical system has a velocity ratio of 3 and an efficiency of 75%. Calculate mechanical advantage of the system?

1.25

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2.25

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3.25

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4.25

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Solution

The correct option is B 2.25
Given,

Velocity ratio =3

Efficiency =75% = 0.75

We know ,

Efficiency = Mechanical advantage / Velocity ratio

Mechanical advantage = Efficiency X Velocity ratio

= 0.75 X 3

= 2.25

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