A "Block and Tackle" is a simple system used to lift heavy objects with less effort. It consists of a set of pulleys and a rope. The pulleys change the direction of the force applied, allowing you to pull down on the rope to lift something up. This makes it easier to move heavy items, like a boat or a tree trunk, by distributing the weight and reducing the amount of force needed. In addition to lifting, block and tackle systems are also used in various applications, such as in construction and sailing. They help make tasks safer and more efficient by allowing one person to lift or move heavy loads without straining themselves.