Final answer:
The acceleration of the ball is 5 m/s².
Step-by-step explanation:
To find the acceleration of the ball, we can use Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. The formula to calculate acceleration is:
Acceleration = Net Force / Mass
In this case, the net force applied to the ball is 100 N and its mass is 20 kg. Plugging these values into the formula:
Acceleration = 100 N / 20 kg = 5 m/s²