A.) A 20 metric ton train moves toward the
south at 70 m/s.
At what speed must it travel to have two
times its original momentum? A metric ton
is 1000 kg.
B.) At what speed must it travel to have a
momentum of 6 × 105 kg · m/s?
Answer in units of m/s.
C.)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 15 m/s while at the same time keeping the momentum the same as in the second part?
Answer in units of kg