A text-book of physics, largely experimental. On the Harvard college "Descriptive list of elementary physical experiments." (1891)
Hall, Edwin Herbert, 1855-1938, Bergen, Joseph Y. (Joseph Young), 1851-1917 · New York, H. Holt and Company · leaf 111
53. We can see at once that, if the pulley B wereIKted one inch while P remained stationary, there would be fourinches of loose string under B. To make the string taut again, P 88 PHYSICS. would have to rise four inches. In actual use P and B rise at thesame time, P moving four times as fast as B.… … FIG. 54. If the weight of the rider, 150 Ibs., rests entirely upon the pedalshown, in its present position, how great a weight acting in opposi-tion, as in the figure, will just neutralize the driving-power? The circumference of the circle described by the pedal is (see Ex.B) 2;rX6 inches, or Yliz…
Physics
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