Simple Machines

Jumpstart your study of mechanical physics with 26 model-building exercises that explore gears as well as all six classic simple machines: wheels and axles, levers, pulleys, inclined planes, screws, and wedges. Start with simple models, then build up to larger, more complex ones that combine multiple machines. A specially designed spring scale lets you measure how these machines change the direction and magnitude of force. The 32-page manual connects your builds to everyday examples like seesaws and wheelbarrows.