A small block slides down a frictionless track whose shape is described by y = (x^2) /d for x<0 and by y = -(x^2)/d for x>0. The value of d is 4.49 m, and x and y are measured in meters as usual. Suppose the block starts from rest on the track, at x = -2.64 m. What will the blocks speed be when it reaches x = 0? 3.90 m/s 2.34 m/s 7.18 m/s 5.52 m/s

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