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21-12-2021
Physics

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A 20 metric ton train moves toward the south at 50 m/s. At what speed must it travel to have four times its original momentum

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21-12-2021

Answer:

200 m/s

Explanation:

as momentum is a product of mass and speed, and mass is not changing, four times the speed will result in four times the momentum.

p = mv

4p = m(4v)

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