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Snowdrift on the Tracks


A railway train running at the rate of 30 mph strikes a snowdrift and is brought to a standstill after going 200 yards. Assuming the drift offers a constant resistance to the passage of the train, find how long the train keeps in motion.

.E. Berely, Problems in Differential Calculus 1895

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"Snowdrift on the Tracks," Convergence (April 2008)