A particle moving in the x-y plane has a position vector given by r = 1.95t2i + 0.56t3j, where r is in inches and t is in seconds. Calculate the radius of curvature ρ of the path for the position of the particle when t = 2.3 sec. Sketch the velocity v and the curvature of the path for this particular instant. Answer should be ρ=________ inches

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