Chapter 7 Practice Quiz Al - Period 7 - Friday, 4/17/20
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In a theoretical machine, work output:
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Can be calculated by dividing output displacement by output force.
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Is always greater than the work input.
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Can be calculated by multiplying output force by output displacement.
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Is always less than the work input.
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Archbishop Wood High SchoolPhysics 9 AL – Period 7Date: 4/17/20 See moreChapter 7 Practice Quiz – Machines, Work, and EnergyMs. Antes DIRECTIONS: Identify the choice that best completes the statement or answers the question.
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- 2.
The metric unit for work is the:
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Newton.
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Joule.
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Watt.
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Meter.
Correct Answer
A. Joule.Explanation
Section 7.1Rate this question:
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- 3.
The fixed point around which levers rotate is called the:
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Input Arm.
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Output Arm.
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Fulcrum.
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Lever Arm.
Correct Answer
A. Fulcrum.Explanation
Section 7.2Rate this question:
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- 4.
Friction is a “catch-all” term for many processes that oppose:
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Heat.
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Wear.
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Motion.
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None of the above.
Correct Answer
A. Motion.Explanation
Section 7.3Rate this question:
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- 5.
All of the following are considered to be simple machines EXCEPT:
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Scissors.
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A bicycle.
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A jackknife.
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A see-saw.
Correct Answer
A. A bicycle.Explanation
Section 7.2Rate this question:
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