Final answer:
The force exerted by the soccer player on the ball would be 4 Newtons.
Step-by-step explanation:
The force experienced by the soccer ball can be calculated using Newton's second law of motion, which states that force is equal to the mass of an object multiplied by its acceleration: F = m * a
In this case, the mass of the soccer ball is 0.400 kg and its acceleration is 10 m/s². Plugging in these values, we get: F = 0.400 kg * 10 m/s² = 4 N
Therefore, the soccer player would exert a force of 4 Newtons on the ball.