Across
- 2. simple machine made up of a rigid bar or plank that rotates on a fixed object called a pivot or fulcrum
- 3. pair of wheels with teeth that interlink; when they rotate together, one gearwheel transfers turning motion and force to the other
- 6. measure of how the speed of the object is affected by a machine; calculated by dividing the input distance by the output distance
- 8. special type of linkage for transferring the energy from the engine to the wheels in large vehicles such as cars and trucks
- 10. simple machine that consists of a cylinder with a groove cut in a spiral on the outside
- 11. a plan or drawing produced to show the look and function or workings of a building, garment, or other object before it is built or made.
- 13. a group of parts that work together to perform a general function, forming a complex machine
- 14. simple machine made up of a flat surface, such as a board, at an angle to another flat surface, such as the ground or a table top; ramp
- 17. done when a force acts on an object to make the object move; calculated by multiplying force times distance
- 18. amount by which a machine can multiply a force; calculated by dividing the output force by the input force
- 20. simple machine made up of a wire, rope, or cable moving on a grooved wheel; may be made up of one or many wheels; can be fixed in place or movable
- 23. purpose or task
- 24. measurement of how well a machine or device uses energy; can be calculated by dividing mechanical advantage by speed ratio or by dividing work output by work input
Down
- 1. measure of the amount of force applied to a given area; as an equation p=F/A, where p is pressure, F is force, and A is area; measured in pascals (Pa)
- 4. when pressure is applied to a liquid in a container, the pressure and force is transmitted equally and undiminished throughout the liquid; an enclosed liquid transmits pressure equally in all directions
- 5. force a machine applies to an object
- 7. tool or device made up of one basic machine
- 9. force that opposes motion
- 12. smaller group of parts within a complex machine that performs a specific function
- 15. system in which simple machines all work together; parts of a complex machine that have just one function are called subsystems and often contain a simple machine
- 16. system that uses a liquid under pressure to move loads; device that uses liquids in a confined space to transfer forces; works according to Pascal’s law
- 17. simple machine made up of two wheels of different diameters that turn together; a longer motion on the wheel produces a shorter but more powerful motion at the axle
- 19. force applied to operate a machine
- 21. belt or chain to transfer energy from an energy source to an object (e.g., a bicycle chain)
- 22. simple machine that looks like an inclined plane, but is forced into an object