assemble · identify · complex · combine · principle
We have now learned about all six simple machines: the inclined plane, the wheel and axle, the lever, the wedge, the screw, and the pulley. These six tools are around us every single day. Engineers assemble and combine simple machines to create complex inventions. Cars, airplanes, and roller coasters are all built using the principles of simple machines. Even a bicycle uses multiple simple machines — you can identify the wheel and axle, the lever, and the pulley. Learning to recognize simple machines helps us understand how the world works and how technology continues to shape our lives.