# physics

A boxcar of mass 200 tons at rest becomes uncoupled on a 2.5 degree grade. If the track is considered to be frictionless, what speed does the boxcar have after 10 seconds?

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1. First compute the acceleration. It will be a = g * sin 2.5

Then compute how far it travels after 10 seconds. X = (1/2) a t^2

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posted by drwls
2. thank you so much. i never knew it could be so simple

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posted by michele

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