Machines

Machines

Assessment

Flashcard

Science

9th - 12th Grade

Hard

Created by

Barbara White

FREE Resource

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23 questions

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1.

FLASHCARD QUESTION

Front

Machine Noun

[muh-sheen]

Back

Machine


A device that makes tasks easier by changing the magnitude or direction of an applied force to transfer energy.

Example: This diagram shows pulley systems, a type of simple machine, using ropes and wheels to lift a heavy weight (W) with less effort (F).
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2.

FLASHCARD QUESTION

Front

Work Noun

[wurk]

Back

Work


The transfer of energy that occurs when a force is applied to an object that moves in the force's direction.

Example: This image shows work being done, as a person applies a force (the push) to move an object (the box) over a distance.
Media Image

3.

FLASHCARD QUESTION

Front

Input Work (Wi) Noun

[in-poot wurk]

Back

Input Work (Wi)


The work done on a machine by the user, calculated as the effort force multiplied by the effort distance.

Example: Applying an effort force with your hand over a distance on a lever is the input work, which makes it easier to lift the load.
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4.

FLASHCARD QUESTION

Front

Output Work (Wo) Noun

[out-poot wurk]

Back

Output Work (Wo)


The work done by a machine on an object, which is the product of the resistance force and resistance distance.

Example: This diagram shows a pulley system, a simple machine, doing work on a 100 lb load. The output work is the work done by the pulley on the load.
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5.

FLASHCARD QUESTION

Front

Effort Force (Fe) Noun

[ef-ert fors]

Back

Effort Force (Fe)


The force exerted by a user on a machine to make it operate, also known as the input force.

Example: This diagram shows that effort force is the push or pull applied to a simple machine, like a lever, to overcome a resistance force.
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6.

FLASHCARD QUESTION

Front

Resistance Force (Fr) Noun

[ri-zis-tuhns fors]

Back

Resistance Force (Fr)


The force exerted by a machine to overcome resistance, such as the weight of an object being lifted.

Example: As the cart moves forward, the rough surface creates a resistance force called friction, which pushes in the opposite direction of the cart's motion.
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7.

FLASHCARD QUESTION

Front

Mechanical Advantage (MA) Noun

[muh-kan-i-kuhl ad-van-tij]

Back

Mechanical Advantage (MA)


A measure of force amplification, calculated as the ratio of the resistance force to the effort force (Fr/Fe).

Example: This diagram shows a lever, a simple machine. Applying a smaller input force over a long effort arm moves a heavier object with a larger output force over a short resistant arm, creating mechanical advantage.
Media Image

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