 ... an eighth of the weight; but this cord is directly attached to the power. Thus the power is an eighth of the weight, or the mechanical advantage is 8. If the weight and the block1 to which it is attached rise 1 inch, the next block rises 2 inches,...  Mechanics, hydrostatics and pneumatics - Page 32by Augustin Privat-Deschanel - 1884Full view - About this book
 | Samuel Haughton - 1867 - 316 pages
...one inch, that p must fall or rise through six inches ; and, therefore, as in the former case, Or, the Work done by the Power is equal to the work done by the Resistance. However complicated a system of pulleys may be, its mechanical effect may always... | |
 | Richard Wormell - 1871 - 288 pages
...by the number 50. Now the following proposition is true of all machines if we neglect friction : — The work done by the power is equal to the work done by the it-eight. If therefore we imagine the weight to be lifted to a certain height h, and then find... | |
 | W. G. Willson - Dynamics - 1874 - 294 pages
...between these forces may be calculated from the Law of Energy, which in this case may be stated. — The work done by the power is equal to the work done against the resistance. This is sometimes called the " principle of constancy of work done." When the... | |
 | Joseph David Everett - Physics - 1877 - 344 pages
...of the weight; but this cord is directly attached to the power. Thus the power is an eighth of the weight, or the mechanical advantage is 8. If the weight...difficult to take them into account when necessary. 66. We now come to the inclined plane. LetAB (Fig. 27) be any portion of such a plane, and let AC and... | |
 | James Andrew Blaikie - 1878 - 184 pages
...power is diminished, and again we see that what is gained in power is lost in space. The fact, that the work done by the Power is equal to the work done against the Weight, may be proved in each machine from the conditions of equilibrium. Thus the above... | |
 | Augustin Privat-Deschanel - Electricity - 1880 - 1176 pages
...of the weight; but this cord is directly attached to the power. Thus the power is an eighth of the weight, or the mechanical advantage is 8. If the weight...28) be any portion of such a plane, and let AC and EC be drawn vertically and horizontally. Then AB is called the length, AC the height, and CB the base... | |
 | Joseph Anthony Gillet, William James Rolfe - Physics - 1881 - 544 pages
...always equal to the weight multiplied by the distance through which it moves. This is simply saying that the work done by the power is equal to the work done upon the weight. The following facts result from the general principle of machines, stated above : — (1.) The faster... | |
 | Joshua Joseph J. Doherty - 1881 - 240 pages
...lifted, and the friction of the parts of the machine. Neglecting for the present the forces of friction, the work done by the power is equal to the work done against the weight. Calling P the power and p the distance through which it moves its point of application... | |
 | William Hewitt - 1882 - 254 pages
...the power only half the weight in a single movable pulley when the strings are parallel 1 Show that the work done by the power is equal to the work done against the resistance when the weight is raised. 39. What is an inclined plane? Give some illustrations... | |
 | Augustin Privat-Deschanel - Light - 1883 - 282 pages
...J)ower is an eighth of the weight, or the mechanical advantage is 8. If the weight and the block 1 to which it is attached rise 1 inch, the next block...take them into account when necessary. 64. Inclined Plane.—We now come to the inclined plane. Let AB (Fig. 28) be any portion of such a plane, and let... | |
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