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6. 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 4.68 m, and x and y are measured in meters as usual. Suppose the block starts from rest on the track, at x = -1.17 m. What will the block s speed be when it reaches x = 0?

		1.70 m/s
		1.19 m/s
		3.12 m/s
		2.40 m/s

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pervious question: OK, same sort of track, but now with d = 2.12 m. Now suppose the blocks starts on the track at x = 4.10 m. The block is given a push to the left and begins to slide up the track, eventually reaching its maximum height at x = 0, at which point it turns around and begins sliding down. What was its initial speed in this case? New question Here we go again this time, d = 4.09 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? 12.24 m/s 11.15 m/s 8.96 m/s 6.34 m/s
QUESTION 6 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 4.93 m, and x and y are measured in meters as usual. Suppose the block starts from rest on the track, at x = -2.42 m. What will the block s speed be when it reaches x = 0? A 4.83 m/s B 3.42 m/s C 2.05 m/s D 7.25 m/s
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