Physical Science Chpt 5

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reganlsu1@yahoo.com
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19512
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Physical Science Chpt 5
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2010-05-16 18:32:45
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Physical Science Chpt
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Physical Science Chpt 5
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  1. trnasfer of energy that occurs when a force makes an object move
    work
  2. formula for work=
    w=fd
  3. the amount of work done in a certain amount of time
    power
  4. formula for power (watts)=
    p=w/t
  5. components of a watt=
    joules per second (j/s)
  6. device that makes doing work easier
    machine
  7. force applied to the machine
    effort force
  8. force applied by the machine
    resistence force
  9. the number of times a machine multiplies the effort force
    mechanical advantage
  10. measure of how much work put into a machine is changed into useful output work by the machine
    efficency
  11. machine machine that does work with only one movement
    simple machine
  12. bar that is free to pivot, or turn, about a fixed point
    lever
  13. grooved wheel with a rope, chain, or cable running along a groove
    pulley
  14. machine consisting of two wheels of different sizes that rotate together
    wheel and axle
  15. sloping surface that rweduces the amount of force required to do work
    inclined plane
  16. inclined plae wrapped in a spiral around a cylinder
    screw
  17. inclined plane with one or two sloping sides
    wedge
  18. when two or more simple machines work together
    compound machine

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