13-99. For a short time, the 250-kg roller coaster car is
Chapter 13, Problem 13-99(choose chapter or problem)
13-99. For a short time, the 250-kg roller coaster car is traveling along the spiral track such that its position measured from the top of the track has components r = 8 m. 0 = (0.1/ + 0.5) rad, and z (0.20 m. where / is in seconds. Determine the magnitudes of the components of force which the track exerts on the car in the r. 0, and z directions at the instant / = 2 s. Neglect the size of the car.
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