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5 Written questions

5 Matching questions

  1. if you throw a ball, are you doing work? Explain.
  2. what is a machine?
  3. What is the formula for power?
  4. What is the scientific meaning of the word "work"?
  5. What is a lever? list two other examples of a lever.
  1. a Work happens when a force causes an object to move in the same direction of that force.
  2. b a simple machine that has a fulcrum, or pivot point.
  3. c 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.
  4. d P=W / T, the unit Watts
  5. e a device that helps make work easier by changing the size or direction of a force.

5 Multiple choice questions

  1. Yes
  2. No, the same amount of work is done, whether you do it yourself, or use a machine.
  3. No
  4. No
  5. a machine made of two or more simple machines. example: scissors, can openers

5 True/False questions

  1. An example of an inclined plane.pushing a piece of heavy furniture up a ramp requires less input force, from you, than just lifting it up.

          

  2. what is a screw?a double inclined plane that moves.

          

  3. What is an inclined plane?a device that helps make work easier by changing the size or direction of a force.

          

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

          

  5. Whats a wheel and axle?turn a door knob (the wheel) the axle moves, to unfasten the door.

          

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