B. Collision In Two Dimension I.line two small marbles 25 cm apart on a flat surface, preferably on the floor. mark the initial positions of the marbles. 2. flick one marble in such a way that it will collide with the other marble. 3.trace the path of each marble after collision. draw it on the space provided in your work sheet. 4. using the protractor, measure and take not of the angle between their paths after collision. Angle : Conclusion