6 books • 1 series
Working with Screws (Doing Work with Simple Machines)
Working with Inclined Planes (Doing Work with Simple Machines)
Working with Pulleys (Doing Work with Simple Machines)
Working with Wheels and Axles (Doing Work with Simple Machines)
Working with Levers (Doing Work with Simple Machines)
Working with Wedges (Doing Work with Simple Machines)