To calculate the resulting acceleration of the ball, we need to consider the net force acting on it. Since the two soccer players are kicking the ball in opposite directions, the net force is the vector sum of their individual forces:

$$F_{net} = F_1 + F_2$$

$$F_{net} = 15N - 5N = 10N$$

According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass:

$$a = F_{net}/m$$

Substituting the values into the equation, we get:

$$a = 10N/2kg = 5m/s2$$

Therefore, the resulting acceleration of the ball is 5 m/s2.