Hall, Edwin Herbert, 1855-1938 · New York, H. Holt and company · leaf 87
e planeitself has not. A wedge commonly has a motion parallel toits own base, while the body raised or otherwise moved byit does not have a motion in this direction. The principleinvolved in the two cases is quite the same, and for a wedgeused to lift a weight we have, leaving friction out of… … EXPERIMENT. Cut out a long narrow triangle of paper, (see Fig. 53), and thenwind it upon a lead-pencil, beginning at the end £Tand keeping theline B all the time at right angles with the length of the pencil. Theline L will make a regular spiral around the pencil, corresponding tothe thread of a…
Physics
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