Handy man's workshop and laboratory . Fig. 177—When deflected and depressed—ratio ^ practically a point source, and the small wires do not sensiblyaffect the motion of the pendulum. First case: When the ratio is 1/1. It was not/found possibleto exactly produce this ratio with springs of brass or steel; thevertical vibration being too fast when the whole suspension wasspring. The best that could be done was a ratio of about 87 to100, which is, however, near enough to enable us to see what thecurve would be, were the exact ratio 1 to 1 Fig. 178—A limiting condition—ratio 3^ 200 HAND
Handy man's workshop and laboratory . Fig. 177—When deflected and depressed—ratio ^ practically a point source, and the small wires do not sensiblyaffect the motion of the pendulum. First case: When the ratio is 1/1. It was not/found possibleto exactly produce this ratio with springs of brass or steel; thevertical vibration being too fast when the whole suspension wasspring. The best that could be done was a ratio of about 87 to100, which is, however, near enough to enable us to see what thecurve would be, were the exact ratio 1 to 1 Fig. 178—A limiting condition—ratio 3^ 200 HANDY MANS WORKSHOP AND LABORATORY Fig. 175 shows the curve obtained when the weight is drawnaside, raised, and released. It is readily seen that the cycle wouldbe complete after three revolutions to the right and three to theleft, were the ratio exactly 1 to 1. When the weight is drawnaside and pulled down, exactly the same curve is described. Thereis, however, a limiting condition when the weight is just suffi-ciently lowered that the upward acceleration of the spring bal-ances the downward acceleration of gravity. We then get the curious case of a freely-moving pendulum whosebob describes a straightline. Second case: Ratio 1 176 shows the curveobtained when the weightis deflected and raised;Fig. 177 when deflectedand depressed. In Fig. 177the cycle is horizontal componentof motion dies out rapidly,and before the reverse halfof the cycle is reached thependulum has lost itsdirective force. In it will be noti
Size: 2722px × 918px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
