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Physics acceleration/velocity problem?

A ball is released at the point x=2m 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.


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