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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.  Here we go again this time, d = 4.13 m. Suppose the block starts on the track at x = 0. What minimum initial velocity (moving to the right) must the block have such that it will leave the track at x = 0 and go into freefall?

		9.00 m/s
		6.36 m/s
		12.29 m/s
		9.33 m/s

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