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5 Written questions

5 Matching questions

  1. what is a screw?
  2. does a machine reduce the amount of work that is being done? Explain.
  3. example of a wheel and axle.
  4. What is a lever? list two other examples of a lever.
  5. What is the formula for power?
  1. a No, the same amount of work is done, whether you do it yourself, or use a machine.
  2. b a inclined plane that is wrapped in a spiral, usually on a rod, but not always.
  3. c P=W / T, the unit Watts
  4. d a simple machine that has a fulcrum, or pivot point.
  5. e turn a door knob (the wheel) the axle moves, to unfasten the door.

5 Multiple choice questions

  1. Yes
  2. No
  3. a machine made of two or more simple machines. example: scissors, can openers
  4. Work happens when a force causes an object to move in the same direction of that force.
  5. you are only doing work on the ball as long as you are directly putting a force on it, in other words, when you are touching it.

5 True/False questions

  1. What is an inclined plane?a simple machine with a straight, slanted surface.


  2. What two things do we need to know to calculate work?W= F x D, the unit Joule


  3. if you are carrying a suitcase,are you doing work on the suitcase? why or why not?No. you are doing work on it when you pick it up, b/c when you pick it up, the direction of the movement of the object is the same as the direction of the force you are putting on it.


  4. What is the formula to calculating work?W= F x D, the unit Joule


  5. What is "power", scientifically speaking?a simple machine with a straight, slanted surface.


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