Answer:We can use Newton's second law of motion (F = ma) to calculate the force for each object: - Object 1: F = 25 kg * 9.8 m/s² = 245 N - Object 2: F = 50 kg * 9.8 m/s² = 490 N - Object 3: F = 20 kg * 15 m/s² = 300 N - Object 4: F = 25 kg * 11.5 m/s² = 287.5 N The 50 kg object accelerating at 9.8 m/s² (Object 2) has the greatest force (490 N). Therefore, the answer is 50 Kg object accelerating at 9.8 m/s2.