CH. 8 VOCAB WORDS

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Across
  1. 2. occurs when a force causes an object to move in the direction of the force
  2. 3. unit used to express work
  3. 6. the rate at which work is done
  4. 8. a device that helps make work easier by changing size or direction of a force
  5. 9. mechanical advantage (MA) = output force / input force
  6. 13. work you do on a machine
  7. 15. tells how many times the machine multiplies force (compares input force with output force)
  8. 16. simple machine consisting of two circular objects of different sizes
  9. 17. unit used to express power
  10. 18. inclined plane that is wrapped in a spiral
  11. 19. mechanical efficiency = work output / work input x 100
  12. 20. simple machine that is a straight, slanted surface
  13. 21. fixed point a lever moves around
Down
  1. 1. machines that are made of two or more simple machines
  2. 4. w(ork) = F(orce) x d(istance)
  3. 5. simple machine consisting of a bar that pivots at a fixed point
  4. 7. Work done by the machine
  5. 10. simple machine consisting of grooved wheel that holds a rope or cable
  6. 11. double incline plane that moves
  7. 12. a comparison of a machine’s work output with the work input
  8. 14. P(ower)= W(ork) / t(ime)