Answer to Question #24791 in Mechanics | Relativity for Cameron crooks

Question

The high speed 300 series Shinkansen trains of Japan consist of 16 aluminum cars with a combined mass of 7.10 x 10 to the power of 5kg the reduction in mass from the 100 series trains enables the 300 series to reach a top speed of 270 km/h. What is the magnitude of a 300 series trains momentum at it top speed?