A wheelbarrow is a small, human-powered vehicle with a large open container, a single wheel at the front, two handles at the back, and two legs, used for easily moving heavy or bulky loads like soil, bricks, or garden waste, functioning as a second-class lever to multiply force for easier transport, especially on rough terrain where its maneuverability shines. Key parts include the tray (steel, wood, plastic), frame, wheel (often rubber-tired), legs, and handles, with single-wheel designs favoring rough ground and two-wheeled versions offering stability on flat surfaces. Key Components & Features Tray/Bed: The main container, often steel, wood, or plastic, holds the load. Wheel: A large-diameter wheel (often pneumatic) at the front reduces rolling resistance, making it easier to push. Handles: Two long handles at the back allow the user to lift and steer. Legs: Support the wheelbarrow when stationary. Frame: Connects the wheel, legs, handles, and tray, often steel for durability. How It Works (Simple Machine) A wheelbarrow acts as a second-class lever, where the load is between the effort (handles) and the fulcrum (wheel axle). Lifting the handles applies force, lifting the load and transferring weight to the wheel, making it easier to move heavy items. Types & Uses Single-Wheel: More maneuverable, better for uneven ground, gardening, and construction. Two-Wheel: Offers more stability for heavier, more industrial loads on smoother surfaces. Uses: Transporting soil, plants, bricks, debris, and even as a makeshift float in floods (with special design).
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