Allow the students to try several ways to lift the jug using the rope and broom handle. Loop the rope over the broom handle and pull down on the the free end. Record the effort. Now loop the rope through the jug handle another time and then up and over the broom handle. You will have 2 loops over the broom and the original not.
Students share results that they have recorded in their journals.
They will see that the more times the rope is looped through the jug and over the broom handle, the less effort needed.