A pulley system has a velocity ratio $3$ and an efficiency of $80 %$ . Calculate the mechanical advantage of the system.

2.0

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3.0

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2.4

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1.4

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Solution

The correct option is C $2.4$
$V e l o c i t y R a t i o = 3$

$E f f i c i e n c y = 80 / 100$

$M e c h a n i c a l A d v a n t a g e = e f f i c i e n c y \times V e l o c i t y r a t i o$

$\Rightarrow \frac{80}{100} \times 3$

$\Rightarrow 2.4$

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