In Fig. 4-35, particle A moves along the line y = 30 m with a constant velocity

Question:

In Fig. 4-35, particle A moves along the line y = 30 m with a constant velocity v of magnitude 3.0 m/s and parallel to the x axis. At the instant particle A passes the y axis, particle B leaves the origin with zero initial speed and constant acceleration d of magnitude 0.40m/s². What angle g between d and the positive direction of the y axis would result in a collision?