Dennis and Larry are working at an assembly plant making wooden toy giraffes. At the end of the line, the giraffes go horizontally off the edge of the conveyor belt and fall into a box below. What must the horizontal velocity (vx ) of giraffes be-as they leave the conveyor belt, if the box is y = 0.90 m below the level of the conveyor belt and x = 0.50 m away from it? show work