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Pulleys and Inclined Planes Quick Check
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Pulleys and Inclined Planes Quick Check
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What is accomplished by this simple pulley?

(1 point)


It changes the duration needed to lift the object.

It changes the direction of the force needed to lift the object.

It changes the total work done to lift the object.


It changes the distance of the pull needed to lift the object.
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Which advantage does a screw have over a nail? (1 point)
Responses

A screw is pushed through a shorter distance.

A screw is able to reduce the total amount of work needed.


A screw allows the force to be applied in a more convenient direction.


A screw can be inserted with less force than a nail.
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Lifting the weight without a pulley requires a force of 400 newtons over a distance of 4 meters. How do these values change when the pulley is applied?

(1 point)
Responses

The force decreases, while the distance increases.


Both the force and the distance increase.


The force increases, while the distance decreases.


Both the force and the distance decrease.
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What is the effect of using this inclined plane?

(1 point)
Responses

The object can be lifted while using a downward force.


The object can be lifted with less force.


The object can be lifted while being pushed over a shorter distance.


The object can be lifted with less total work.
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The correct answer is: It changes the direction of the force needed to lift the object.
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The correct answer is: A screw allows the force to be applied in a more convenient direction.
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When a pulley is applied, the force required to lift the weight is reduced, but the distance over which it must be applied increases. So, the correct answer is: The force decreases, while the distance increases.
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The correct answer is: The object can be lifted with less force.