Chapter 7 Practice Quiz Cpl - Period 1 - Friday, 4/17/20
Archbishop Wood High SchoolPhysics 9 CPL – Period 1Date: 4/17/20
Chapter 7 Practice Quiz – Machines, Work, and EnergyMs. AntesDIRECTIONS:
Identify the choice that best completes the statement or answers the question.
- 1.
The metric unit for work is the:
- A.
Newton.
- B.
Joule.
- C.
Watt.
- D.
Meter.
Correct Answer
B. Joule.Explanation
Section 7.1Rate this question:
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- 2.
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 7.2Rate this question:
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- 3.
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 7.2Rate this question:
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- 4.
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 7.2Rate this question:
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- 5.
Friction is a “catch-all” term for many processes that oppose:
- A.
Heat.
- B.
Wear.
- C.
Motion.
- D.
Temperature.
Correct Answer
C. Motion.Explanation
Section 7.3Rate this question:
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