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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. The value of d is 2.29 m, and x and y are measured in
meters as usual. Suppose the block starts from rest on the track,
at x = -1.71 m. What will the block s speed be when it reaches x =
0?
5.01 m/s
3.54 m/s
1.06 m/s
8.02 m/s
Same type of track as in the previous problem, this time with d
= 3.60 m. The block starts at x = 0, and is given a push to the
left with an initial speed of 2.23 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?
-0.25 m
-0.96 m
0.96 m
0.25 m
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