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A train engine that was pulling over
a hundred cars loaded with freight came to a stop at a junction. The
engine detached and a new train engine backed up and coupled onto the
long line of freight cars. The new engine then tried to move forward.
It tried several times, using full throttle, but was unable to budge
the long line of heavy freight cars.
The engineer put the train into reverse, backed up a few feet, and
then tried to move forward. The train then moved down the track,
pulling the long line of freight cars behind it without any problem.
Why?
Robin D. B. |
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