WordReference Random House Unabridged Dictionary of American English © 2019
foot-ton  (fŏŏttun),USA pronunciation n. [Physics.]
  1. a foot-pound-second unit of work or energy, equivalent to 2240 foot-pounds and equal to the energy expended in raising a ton of 2240 pounds a distance of one foot against the force of gravity.
  • 1865–70

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