If mechanical advantage of a machine is equal to 1 , it is used to change the ________

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Solution

Mechanical advantage is defined as the ratio of load (L) to the effort (E) and denoted by MA.
Mechanical advantage $M = \frac{load (L)}{effort (E)}$
When MA=1, (i.e) effort equal to load the machine is used to change the direction of effort.

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