Question: At the instant represented, r = 2 0 0 mm and rod OA is rotating with angular velocity theta dot = 8 rad / s

At the instant represented, r=200 mm and rod OA is rotating with angular velocity theta dot=8rad/s and angular acceleration theta dot dot=-20 rad/s^2/ Through mechanical means collar B moves along the rod with a constant speed of r dot=-300mm/s. Determine the magnitude of the radial component of the acceleration ar of the collar at this instant.

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