(figure 1)a roller coaster car may be approximated by a block of mass m. The car, which starts from rest, is released at a height h above the ground and slides along a frictionless track. The car encounters a loop of radius r, as shown. Assume that the initial height h is great enough so that the car never loses contact with the track.
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Acheetah ran 75 meters at a speed of 25 meters per second. how long was the cheetah running? 3 seconds 5 seconds 30 seconds 50 seconds
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(figure 1)a roller coaster car may be approximated by a block of mass m. The car, which starts from...
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