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5 Written Questions

5 Matching Questions

  1. ^ ^ Doing work?
  2. Whats a wheel and axle?
  3. ^ ---> Doing work?
  4. what is a machine's mechanical advantage? if i say a machine has a mechanical advantage of 20, what does that mean?
  5. If machines do not reduce the amount of work being done, how do they help us?
  1. a a simple machine that is made of a circular object connected to a rod.
  2. b Machines can change the size of the input force necessry. Also, they can change the direction of the force, which is especially helpfulo when we are trying to life somthing.
  3. c No
  4. d Yes
  5. e it means that the machine multiplies the force you put into it twenty times. so, if the machine multiplies the force by 20, you would only have to put in a small amount of force to do a large amount of work.

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. simple machine that is made of a wheel with a groove in it and a rope. it is usually used to life heavy objects.
  4. a simple machine that has a fulcrum, or pivot point.
  5. No. work is only done when the object moves. if the object doesnt move, no matter how much force you put on it, it isnt work.

5 True/False Questions

  1. if you throw a ball, are you doing work? Explain.No. work is only done when the object moves. if the object doesnt move, no matter how much force you put on it, it isnt work.

          

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

          

  3. What is the fulcrum of a lever?stays still, like the middle of a seesaw.

          

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

          

  5. What is "power", scientifically speaking?the rate at which work is done.

          

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