What do you understand by mechanical advantage?

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Solution

Mechanical advantage:
The mechanical advantage of a lever is the ratio of the load lifted by the machine to the effort applied to it.
Or It can be defined as the ratio of the length of the effort arm to the length of the load arm.
$M e c h a n i c a l a d v a n t a g e = \frac{L e n g t h o f E f f o r t a r m}{L e n g t h o f L o a d a r m} = \frac{L o a d}{E f f o r t}$

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