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Question: a boxcar of mass 250 tons at rest becomes uncoupled...

Question details

A boxcar of mass 250 tons at rest becomes uncoupled on a 4.0° grade. If the track is considered to be frictionless, what speed does the boxcar have after 11 seconds?

a. 0.1 m/s

b. 19.6 m/s

c. 12.8 m/s

d. ​0.8 m/s

e. 7.5 m/s

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