What is accomplished by this simple pulley?
(1 point)
• It changes the duration needed to lift the object.
• It changes the distance of the pull needed to lift the object.
• It changes the total work done to lift the object.
• It changes the direction of the force needed to lift the object.
• It changes the direction of the force needed to lift the object.
Which advantage does a screw have over a nail? (1 point)
• A screw is able to reduce the total amount of work needed.
• A screw is pushed through a shorter distance.
• A screw can be inserted with less force than a nail.
• A screw allows the force to be applied in a more convenient direction.
• A screw can be inserted with less force than a nail.
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)
• Both the force and the distance increase.
• The force increases, while the distance decreases.
• Both the force and the distance decrease.
• The force decreases, while the distance increases.
• The force decreases, while the distance increases.
What is the effect of using this inclined plane?
(1 point)
• The object can be lifted while being pushed over a shorter distance.
• The object can be lifted with less total work.
• The object can be lifted with less force.
• The object can be lifted while using a downward force.