8. 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 d = 2.52 m. Now suppose the blocks starts on the track at x = 2.36 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?     6.59 m/s     4.66 m/s     7.88 m/s     8.78 m/s

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8. 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 d = 2.52 m. Now suppose the blocks starts on the track at x = 2.36 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?

   

6.59 m/s

   

4.66 m/s

   

7.88 m/s

   

8.78 m/s

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