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 = 4.23 m. The block starts at x = 0, and is given a push to the left with an initial speed of 6.70 m/s, so it starts sliding up the track to the left. At what value of x will the block reverse direction and start sliding back down?

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7. 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 = 4.23 m. The block starts at x = 0, and is given a push to the left with an initial speed of 6.70 m/s, so it starts sliding up the track to the left. At what value of x will the block reverse direction and start sliding back down?

   

2.29 m

   

-2.29 m

   

-3.11 m

   

3.11 m

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