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.
The correct answer is: It changes the direction of the force needed to lift the object.
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.