Simple Machines
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Simple machines include wheels and axles, pulleys, inclined planes, wedges, screws, and levers. They have few moving parts and make work easier by changing either the size or direction of force. Wheels and axles allow rotation, pulleys use grooved wheels and ropes to transmit force, and inclined planes lower the amount of force needed to lift an object. Levers come in three classes depending on the position of the fulcrum and load. Simple machines can be combined to create more complex machines.
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Simple Machines
Editor's Notes
- A sloping surface, such as a ramp. An inclined plane can be used to alter the effort and distance involved in doing work, such as lifting loads. The trade-off is that an object must be moved a longer distance than if it was lifted straight up, but less force is needed. You can use this machine to move an object to a lower or higher place. Inclined planes make the work of moving things easier. You would need less energy and force to move objects with an inclined plane.