Final answer:
The acceleration of object B cannot be determined.
Step-by-step explanation:
The force F on an object is equal to its mass m multiplied by its acceleration a, according to Newton's second law of motion. Therefore, the acceleration of an object is directly proportional to the force applied and inversely proportional to its mass.
In this case, object A and object B both have a force of 50 N applied to them. However, since the mass of object A is 50 kg, while the mass of object B is not given, we cannot determine the acceleration of object B. Therefore, the correct answer is (d) The acceleration of object B cannot be determined.