Tuesday, November 15, 2011

Science - Simple Machines: Levers



Please go to this website and spend at least ten minutes there reading and understanding the information about the three different classes of levers.  Pay attention to the where the load is in relation to the fulcrum and the effort force: that will help you understand the three classes of lever

Then take this quiz.  You must click the green START button on the top of the page to take the quiz. 

When you have finished the quiz please comment on one question you got wrong.  Then comment on one thing  you learned.  You must not have the same comment as a previous poster...

30 comments:

  1. I learned that a crowbar is the same class as a hammer claw. Jake

    ReplyDelete
  2. One of the questions that I got wrong was what kind of lever is a hockey stick I answered a hockey stick is not a lever but it is a third class lever. One thing that I learned was that scissors are a type of lever and that levers were invented in ancient Grease.

    Lena

    ReplyDelete
  3. I learned that a hockey stick is a third class leaver. Carly

    ReplyDelete
  4. The question I got wrong is 11. I guessed a hockey stick is not a lever.

    Ryan

    ReplyDelete
  5. I got 10 and 13 wrong. I learned that the farther the fulcrum is from the effort force the less effort is needed.

    JP

    ReplyDelete
  6. The one question I got wrong was the question were it asked you to say what kind of lever was a hockey stick. I said it wasn’t a lever but, I was wrong it is a third class lever. Anika

    ReplyDelete
  7. I thought for when the answer was advantage I miss understood the question and thought that it was what we measured it in and selected Kilograms but now I understand. One thing I learned was that pliers are two 1st class levers. Branden

    ReplyDelete
  8. One question I got wrong was “what class is a crow bar”. One thing I learned was that a crowbar is a third class lever

    Jayden

    ReplyDelete
  9. I got the one about the crowbar wrong. That levers were used in prehistoric times.

    hannah

    ReplyDelete
  10. The question I got wrong was the a benefit obtained by using a lever is called an advantage and I chosen Newton there are disadvantage and there are advantages to the lever. Halle

    ReplyDelete
  11. One question I got wrong was 12 the crowbar one due to a glitch.
    I learned was that a hockey stick is class 3.
    Lindsay

    ReplyDelete
  12. One of the questions I got wrong was the one about what you use to weigh the load. I got confused about how it said (n) after the question, so I thought it meant Newton’s. One thing I learned that a stapler is a second class lever. Catherine

    ReplyDelete
  13. I got the question about the benefit that levers have. I thought it was effort it was actually advantage. I learned that hammer’s claws are a First class lever.
    ~Emily

    ReplyDelete
  14. I got 2 , 3, 10, 13 wrong .I learned that the effort decreases as the load moves farther from the fulcrum.


    Martin

    ReplyDelete
  15. I got the question 12 wrong that one asked that what class is the crowbar. I learned that scissors is a 2nd class lever.
    Connor.

    ReplyDelete
  16. I learned that a nut cracker is a 2nd class lever.

    Josh

    ReplyDelete
  17. The question i got wrong was question 2. I learned that a benefit obtained by using a lever is called an advantage.
    Rebecca

    ReplyDelete
  18. I had got question 4 wrong it asked what unit is the effoet measured by load I had said kilogram but it was newtons. I have learned that they measure it by newtons.Simmy.

    ReplyDelete
  19. I got 3, 10, 11 and 12 wrong.
    I learned that scissors are a first class lever.
    Lindsey

    ReplyDelete
  20. The question I got wrong was: A crowbar is class one, class two, class three or class four. Now I know a crowbar is class one. That is one of the things that I have learned.
    jk

    ReplyDelete
  21. One of the questions I got wrong was 3, when the load is moved farther from the fulcrum it increases not decreases. One of the things that I learned is that a nutcracker is a lever and it is in class two and I know it is a lever because when you push on it goes down. Jadenn

    ReplyDelete
  22. The question I got wrong was: A crowbar is class one, class two, class three or class four. Now I know a crowbar is class one. That is one of the things that I have learned.
    jk

    ReplyDelete
  23. I got question 12 wrong and I learned that a crowbar is a first class lever.
    Cameron

    ReplyDelete
  24. I got 3 and 5 wrong. I learned that, I that as the load is moved farther from the fulcrum, the effort needed to lift the load is increases it does not stay the same.
    Aastha

    ReplyDelete
  25. I learned that a hockey stick is a lever the type of lever it is a class three. Ben

    ReplyDelete
  26. One of the questions I got wrong was question six. I thought the class two lever has the fulcrum in the middle but the class two lever has the load in the middle. I learned the stapler is a class two lever. Rielle.

    ReplyDelete
  27. The question I got wrong was 13 because I pressed false instead of true. The thing I lernt was that the farther the effort force was from the fulcrum the less effort force you have to use. Jacob

    ReplyDelete
  28. I learned that when I got question 3 as the load is moved farther from the fulcrum, the effort needed to lift the load increases not decreases. J.M

    ReplyDelete
  29. I got the one about the crowbar wrong it was used in prehistoric times. Cole

    ReplyDelete
  30. I learned that if you move further a way from the fulcram the lighter you will apear. Kobe

    ReplyDelete

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