4. Which of the following objects has the momentum with the greatest magnitude? A 9-kg mass moving at 3m/s B. A 12-kg mass moving at 1m/s C. A 5-kg mass moving at 2m/s D. A4-kg mass moving at 4m/s

To determine which object has the momentum with the greatest magnitude, we need to calculate the momentum for each object and compare them.Momentum is defined as the product of an object's mass and its velocity. The formula for momentum is: Let's calculate the momentum for each object:A. For a 9-kg mass moving at 3 m/s: B. For a 12-kg mass moving at 1 m/s: C. For a 5-kg mass moving at 2 m/s: D. For a 4-kg mass moving at 4 m/s: Comparing the momenta, we can see that the momentum with the greatest magnitude is 27 kg·m/s, which corresponds to option A.Therefore, the correct answer is A.