Chapter 7 Practice Quiz Al - Period 7 - Friday, 4/17/20

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Chapter 7 Practice Quiz Al - Period 7 - Friday, 4/17/20 - Quiz


Archbishop Wood High SchoolPhysics 9 AL – Period 7Date: 4/17/20 Read moreChapter 7 Practice Quiz – Machines, Work, and EnergyMs. Antes DIRECTIONS: Identify the choice that best completes the statement or answers the question.


Questions and Answers
  • 1. 

    In a theoretical machine, work output:

    • A.

      Can be calculated by dividing output displacement by output force.

    • B.

      Is always greater than the work input.

    • C.

      Can be calculated by multiplying output force by output displacement.

    • D.

      Is always less than the work input.

    Correct Answer
    C. Can be calculated by multiplying output force by output displacement.
    Explanation
    Section 7.2

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  • 2. 

    The metric unit for work is the:

    • A.

      Newton.

    • B.

      Joule.

    • C.

      Watt.

    • D.

      Meter.

    Correct Answer
    B. Joule.
    Explanation
    Section 7.1

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  • 3. 

    The fixed point around which levers rotate is called the:

    • A.

      Input Arm.

    • B.

      Output Arm.

    • C.

      Fulcrum.

    • D.

      Lever Arm.

    Correct Answer
    C. Fulcrum.
    Explanation
    Section 7.2

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  • 4. 

    Friction is a “catch-all” term for many processes that oppose:

    • A.

      Heat.

    • B.

      Wear.

    • C.

      Motion.

    • D.

      None of the above.

    Correct Answer
    C. Motion.
    Explanation
    Section 7.3

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  • 5. 

    All of the following are considered to be simple machines EXCEPT:

    • A.

      Scissors.

    • B.

      A bicycle.

    • C.

      A jackknife.

    • D.

      A see-saw.

    Correct Answer
    B. A bicycle.
    Explanation
    Section 7.2

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  • May 08, 2023
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