The path of motion of a 5-lb particle in the horizontal
Chapter 13, Problem 13-87(choose chapter or problem)
The path of motion of a 5-lb particle in the horizontal plane is described in terms of polar coordinates as r = (2t + 1) ft and u = (0.5t 2 - t) rad, where t is in seconds. Determine the magnitude of the unbalanced force acting on the particle when t = 2 s.
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