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A box weighing 100 newtons is pushed up an inclined plane that is 5 meters long. It takes a force of 75 newtons to push it to the top,which has a height of 3 meters. What is the efficiency?

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Anna applies a force of 19.5 newtons to push a book placed on a table. If the normal force of the book is 51.7 newtons, what is the coefficient of kinetic friction? A) .01 B) .20 C) .38 D) .48

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A baseball with a mass of 0.15 kilograms collides with a bat at a speed of 40 meters/second. The duration of the collision is 8.0 × 103 seconds. The ball moves off with a speed of 50 meters/second in the opposite direction. What

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It takes 27 joules to lift a 20pound box. A worker has a lever available that is 2.5 meters long. Which amount of force needs to be applied to lift the box? • 0.54 newton • 10.8 newtons • 67.5 newtons • 5.4 newtons

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Elle is pushing a box of mass 7.0 kilograms with the force of 25 newtons. If the force of friction is 2.6 newtons, what is the value of acceleration of the box?

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Mass is a measure of how much “stuff” is in an object. The SI unit for mass is the kilogram (kg). Weight depends on the force of gravity. The SI unit for force is the newton (N). On Earth, a 1kg object weighs about 9.81 N.

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Your friend has slipped and fallen. To help her up, you pull with a force F, as the drawing shows. The vertical component of this force is 140 newtons, and the horizontal component is 145 newtons. _____N and the angle
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