The Block and Tackle Pulley System
A block and tackle is a combination of pulleys and ropes used for lifting very heavy loads.
It was designed by a scientist called Archimedes, who lived on an island called Sicily in Italy.
The block and tackle pulley system is a number of pulleys sharing one fixed axle at the
top. This part is known as the block. The block is connected by ropes to another set
of movable pulleys at the bottom, also connected to one axle.
The movable part at the bottom is called the tackle.