If a ball moves in this direction <- and is hit and force is exerted in this direction ^....?

reference the force in Newtons then make a proportional translation into millimeters, centimeters, etc. whatever will fit on a peice of paper. draw with a ruler the lines you figured out and at the same angles of the directional change. you know have two lines forming an angle. Now make a parralelogram based on that angle. Next draw a line from the vertex (vertex?) to the other corner. This is a grapical representation of what will happen.