Final answer:
The acceleration of the 50-kg skater is 0.5 m/s².
Step-by-step explanation:
The acceleration of the 50-kg skater can be calculated using Newton's second law, which states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
Net force = Force exerted by the 50-kg skater - Force opposing the motion = 25 N - 0 N = 25 N.
Acceleration = Net force / Mass = 25 N / 50 kg = 0.5 m/s².
Therefore, the 50-kg skater has an acceleration of 0.5 m/s².