15-111. The 800-lb roller-coaster car starts from rest on
Chapter 15, Problem 15-111(choose chapter or problem)
15-111. The 800-lb roller-coaster car starts from rest on the track having the shape of a cylindrical helix. If the helix descends 8 ft for every one revolution, determine the speed of the car in t = 4 s. Also, how far has the car descended in this time? Neglect friction and the size of the car.
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