Across
- 4. Belt or chain to transfer energy from an energy source to an object (e.g., a bicycle chain).
- 7. 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.
- 9. 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.
- 10. 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.
- 12. Simple machine that consists of a cylinder with a groove cut in a spiral on the outside.
- 17. Tool or device made up of one basic machine.
- 19. 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.
- 21. Simple machine made up of a rigid bar or plank that rotates on a fixed object called a pivot or fulcrum.
- 23. Force a machine applies to an object.
- 25. 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).
Down
- 1. 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.
- 2. 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.
- 3. The ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine.
- 5. Device that helps us do work.
- 6. Special type of linkage for transferring the energy from the engine to the wheels in large vehicles such as cars and trucks.
- 8. Measure of how the speed of the object is affected by a machine; calculated by dividing the input distance by the output distance.
- 11. 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.
- 13. Simple machine that looks like an inclined plane, but is forced into an object.
- 14. Smaller group of parts within a complex machine that performs a specific function.Science in Action 8.pdf
- 15. A simple lifting machine consisting of a rope that unwinds from a wheel onto a cylindrical drum or shaft joined to the wheel to provide mechanical advantage.
- 16. Force that opposes motion.
- 18. Pair of wheels with teeth that interlink; when they rotate together, one gearwheel transfers turning motion and force to the other. Scie
- 20. Force applied to operate a machine.
- 22. Purpose or task.
- 24. Is done when a force acts on an object to make the object move.