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A 20.0-kg box is at rest at the bottom of a 20.0 m -long ramp that makes an angle 30° with the horizontal. A constant horizontal force of 290 N is applied to the box to push it up the ramp. While the box is moving, the ramp exerts a constant frictional force on it that has magnitude 65.0 N.
a. Calculate the total work done on the box during its motion from the bottom to the top of the ramp?
b. How long does it take the box to travel to the top of the ramp?
A bird watcher meanders through the woods, walking 0.30 kilometer due east, 0.80 kilometer due south, and 2.60 kilometer in a direction 33 degree north of west. Find the magnitude and direction of the bird watcher average velocity
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the center of a 1.50km diameter spherical pocket of oil is 1.50km beneath the earths surface. estimate by what
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