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

5 Questions | Attempts: 50
Share  Settings  Archbishop Wood High School Physics 9 AL – Period 7 Date: 4/17/20 Chapter 7 Practice Quiz – Machines, Work, and Energy Ms. Antes DIRECTIONS:

• 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.

• 2.
The metric unit for work is the:
• A.

Newton.

• B.

Joule.

• C.

Watt.

• D.

Meter.

• 3.
The fixed point around which levers rotate is called the:
• A.

Input Arm.

• B.

Output Arm.

• C.

Fulcrum.

• D.

Lever Arm.

• 4.
Friction is a “catch-all” term for many processes that oppose:
• A.

Heat.

• B.

Wear.

• C.

Motion.

• D.

None of the above.

• 5.
All of the following are considered to be simple machines EXCEPT:
• A.

Scissors.

• B.

A bicycle.

• C.

A jackknife.

• D.

A see-saw.

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