Select an example of a vertical motion with a positive velocity and a negative acceleration. select the correct example and explanation. a)a tossed ball on its way down. as the ball moves down it is slowing down, hence the acceleration is opposite the bvelocity (negative).b) a tossed ball on its way upward. as the ball moves upward it is slowing down, hence the acceleration is pointing in the same direction as the velocity (negative).c) a tossed ball on its way upward. as the ball moves upward it is slowing down, hence the acceleration is opposite the velocity (negative).d) a tossed ball on its way down. as the ball moves down it is slowing down, hence the acceleration is pointing in the same direction as the velocity (negative).