Cranes, Dump Trucks, Bulldozers and Other Building Machines
Each book in the How Things Work series features easy-to-read text and detailed color illustrations, many of them cut away to show interior views. Special Focus On boxes highlight and explain important scientific principles, and simple Test It Out! experiments and activities let readers discover for themselves how things really work.
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2nd class 3rd class lever ARCHIMEDES SCREW attached backhoe loader blade boom bottle braking bucketful of soil building machines bulldozer called cars Cement Mixer Climbing frame compressed air COMPRESSOR Construction Auger Counterweights crawler tracks cutting head cylinder delivery chute diesel engines dipper arm driven driver's cab drum turns dump the load effort excavator flatten and smooth fluid is pumped front loader fulcrum giant drills gravel ground hammer hoist cable hole Homo habilis hopper Hydraulic control lever hydraulic fluid hydraulic systems inside invented layers lift the weight liquid mobile crane modeling clay nozzle object object's center operator OUTRIGGERS pendulum piston piston moves Plastic push ramp Road Paver rock roller sand scraper screed screwdriver send a force shovel simple machines single pulley spool st class lever steel steering stone surface swing TEST thread tons tower cranes truck cranes tube tunnel Tunnel-Boring Machine vibrates wheels and tires Wood screws wrecking ball