Simple Machines

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Across
  1. 2. The opposing force that must be overcome to move an object. In simple machines, it is often the weight of the load.
  2. 5. A simple machine that is thick at one end and tapers to a thin edge at the other, used to split or cut materials.
  3. 7. The pivot point around which a lever turns. The position of the fulcrum affects the mechanical advantage of the lever.
  4. 8. The resistance that one surface or object encounters when moving over another. It can affect the efficiency of simple machines.
  5. 10. The force applied to a machine to move a load. This is the input force that you exert.
  6. 12. Advantage The ratio of the output force produced by a machine to the input force applied to it. It measures how much a machine multiplies force.
  7. 14. A simple machine that consists of a wheel on an axle, with a rope or cable that can change the direction of the force applied, making it easier to lift loads.
Down
  1. 1. A simple machine that consists of a cylinder with a spiral ridge (thread). It converts rotational motion into linear motion and can hold things together or lift materials.
  2. 3. Machine A device that changes the direction or magnitude of a force, making work easier. Examples include levers, pulleys, inclined planes, wedges, screws, and wheel and axles.
  3. 4. A twisting force that causes rotation. It is important in understanding how levers and screws work.
  4. 5. The measure of energy transfer that occurs when an object is moved over a distance by an external force. It is calculated as force multiplied by distance.
  5. 6. A measure of how much useful work is accomplished by a machine compared to the total energy input. High efficiency means less energy is wasted.
  6. 9. and Axle A simple machine made up of a wheel attached to a smaller axle, allowing for easier movement of loads by reducing friction.
  7. 11. Plan A flat surface that is tilted at an angle to help lift objects. It reduces the amount of force needed to raise an object.
  8. 13. The weight or resistance that is being moved or lifted by a machine. In levers, it is the object being lifted.