How can you calculate the mechanical advantage a simple machine provides?

Question

Responses:

divide the output force by the input force

Simple machines do not provide a mechanical advantage.

divide the output displacement by the input displacement

divide the output force by the output displacement

Answer 1

The correct way to calculate the mechanical advantage provided by a simple machine is to divide the output force by the input force.

So, the first response is correct:

Divide the output force by the input force.

Answer 2

How can a simple fixed pulley make a job easier?
Responses

by decreasing the work done

by decreasing the force required to lift the object

by decreasing the distance that the force needs to be applied

by changing the direction at which the force needs to be applied