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anonymous

  • 4 years ago

Which of the following is an example of a lever? A. knife B. screw C. nutcracker D. pencil sharpener I think it's either A or B

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  1. anonymous
    • 4 years ago
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    A

  2. Chris
    • 4 years ago
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    I agree with Jose - levers are a single bar and pivot point

  3. Chris
    • 4 years ago
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    A nutcracker is a "double" lever

  4. anonymous
    • 4 years ago
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    Seriously? We are splitting hairs here? A knife is a wedge first of all. A screw is an inclined plane, and a pencil sharpener is a wedge and if one of those fancy ones, it has gears. The answer is definitely nutcracker.

  5. Chris
    • 4 years ago
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    hmmm, I don't understand why a knife is not a lever - I suppose it depends on how it is used.

  6. Chris
    • 4 years ago
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    see your point on nutcracker clearly being a lever though.

  7. Chris
    • 4 years ago
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    bah, I think you're right

  8. Chris
    • 4 years ago
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    knife is two incline planes

  9. Chris
    • 4 years ago
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    i.e. wedge

  10. anonymous
    • 4 years ago
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    What is the main function of a knife? To cut right? The simple machine that cuts is the wedge. Because we are evolutionary creatures, we have figured out that we can cut with more power if we use the knife in a lever fashion. Albeit, a knife is a wedge at its core.

  11. Chris
    • 4 years ago
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    yep =) I think you're right. Just found this resource that backs it up: http://www.edheads.org/activities/simple-machines/glossary.shtml

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