Hale, Joseph W. L. (Joseph Woodwell Ledwidge), 1886- · New York [etc.] McGraw-Hill book company · leaf 185
every 100 ft. horizontally.) 170 MECHANICS AND ALLIED SUBJECTS How many foot-pounds of work are required to lift a 600-tontrain up this distance against gravity? 30. Find the average angle of incline for the roadbed fromAltoona, Pa., toGallitzin, Pa., the rise being about 980 ft. in 10 miles. 31.…
Mechanics, Applied
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