Compound Machines
All machines make the work easier. Without using machines many tasks are virtually impossible. Although simple machines are used as useful tools, most machines are a combination of two or more simple machines. Such machines are called compound machines. 

Compound machines help us to cut and form material, lift heavy objects, transport heavy objects or more complex tasks such as packaging, sewing, mixing and many more.

In this project you will construct a compound machine using two or more simple machines. 

Material and instructions:
In this project you will use wood, nylon string, pulleys and some other material to make models of a winch, a power lift, an elevator or other similar machines that are used to lift heavy objects. More advanced students may also calculate the mechanical advantage of their machine and report it in the form of a table, a graph or both. 
Details of this project
More information or support on this project is available for the members of Wooden parts may be purchased from a local hardware store. Pulleys and spring scales may be purchased from