Question

What happens when mechanical advantage (MA) becomes equal to one?

Answer 1

Mechanical Advantage:

Mechanical advantage is defined as the ratio of load to effort.

$MA=\frac{L}{E}$

Where $MA$ denotes the mechanical advantage, $L$ denotes the load and $E$ denotes the effort.

Thus $MA=1$ then the effort exerted on the machine is equal to the load.

For example:

To lift the bucket from the well, the effort is applied on a pulley in a downward direction while the bucket is pushed in an upward direction such that the amount of effort exerted is equal to the weight of the bucket.