Aball 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 is described by one of the following cases: case 1 a > 0 v0 > 0; case 2 a > 0 v0< 0; case 3a< 0 v0 > 0; case 4a < 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 mo/re information needed to determine whether the ball will cross x = 0?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?