Chapter 8 Science Reed

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Across
  1. 1. a double inclined plane that moves
  2. 5. The fixed point around which a lever pivots
  3. 6. a device that helps make work easier by changing the size or direction of a force
  4. 8. occurs when a force causes an object to move in the direction of the force
  5. 9. power = work/time
  6. 10. A simple machine that consists of a grooved wheel that holds a rope or a cable
  7. 13. a simple machine that is a straight, slanted surface
  8. 15. a comparison of a machine's work output with the work input
  9. 16. MA = output force/input force
  10. 18. the work you do on a machine
  11. 19. Therefore, the unit used to express power is joules per second (J/s), which is more simply called _______
Down
  1. 1. the work done by machine
  2. 2. work = force x distance
  3. 3. work output/work input x 100
  4. 4. a simple machine that consists of a bar that pivots at a fixed point called a fulcrum
  5. 7. machines that are made of two or more simple machines
  6. 8. a simple machine consisting of two circular objects of different sizes
  7. 11. the unit used to express work is the newton-meter (N times m), which is more simply called _______
  8. 12. tells you how many times the machine multiplies force
  9. 14. an inclined plane wrapped in a spiral
  10. 17. the rate at which work is done