More About Pulleys and The Extra Hand

Lots of machines have pulleys in them for example a cage that pulls you across a river.                           David

You use pulleys when you are sailing. It makes it easier to pull the sails up. You also use pulleys on cranes to lift up heavy objects like big containers. Also on flying foxes you connect the pulley to the wire. And with flags you use the pulley to raise the flag.                      Ben

You can find pulleys on cranes, garbage trucks with claws, big boats, sail boats, ski lifts, drawbridges, flag poles and bikes.              Margeaux

Today we had a big argument about where the weight goes when you pull the weight up with the pulley. First Ben said half the weight goes to the beam. It does, so he was right. The beam acts like another hand.                        Patrick

We learned that the beam supported half of the weight and our hands supported the other half of the weight.                    Josh

The weight will be half the weight that it actually is. This is because the beam is acting like another person so it is halving the weight between you and the beam.   Margeaux