A ball is released at the point x = 2 m on an inclined plane with a nonzero initial velocity. After being released, the ball moves with constant acceleration. The acceleration and initial velocity of the ball are described by one of the following four cases: case 1, a > 0, v0 > 0; case 2, a > 0, v0 < 0; case 3, a < 0, v0 > 0; case 4, a < 0, v0 < 0.
(a) In which of these cases will the ball definitely pass x = 0 at some later time?
(b) In which of these cases is more information needed to determine whether the ball will cross x = 0?
(c) In which of these cases will the ball come to rest momentarily at some time during its motion?

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