# A 15 metric ton train moves toward the south at 50 m/s.

Anonymous

Question description

A. At what speed must it travel to have a momentum of 7 x 10^5 kg * m/s? Answer in units of m/s.

B. If there were a speed limit for this train as it traveled through a city, but not a weight limit, what mass must be added to the train to slow it down to 25 m/s while at the same time keeping the momentum the same as in the second part? Answer in units of kg.

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