Answer :
Final answer:
To determine the train with the greatest momentum, calculate the momentum using the formula mass x velocity for each train car. Train car A has the greatest momentum with 1,900,000 kg·mph.
Explanation:
In order to determine which train has the greatest momentum, we need to calculate the momentum of each train car using the formula: momentum = mass x velocity.
Train car A has a mass of 9500 kg and a velocity of 200 mph, so its momentum is 1,900,000 kg·mph.
Train car B has a mass of 8000 kg and a velocity of 215 mph, so its momentum is 1,720,000 kg·mph.
Train car C has a mass of 9300 kg and a velocity of 190 mph, so its momentum is 1,767,000 kg·mph.
Train car D has a mass of 8600 kg and a velocity of 195 mph, so its momentum is 1,677,000 kg·mph.
Therefore, train car A has the greatest momentum with 1,900,000 kg·mph.
