 | James Wood - Mechanics - 1818 - 226 pages
...the radius ; in this case, the power : the pressure :: 1 : 2. PROP. XXII. (108.) In a system where the same string passes round any number of pulleys,...the parts of it between the pulleys are parallel, P : W :: 1 : the number of strings at the lower block. Since the parallel parts, or strings at the... | |
 | 1840 - 772 pages
...where the strings are parallel, there is an equilihrium when the power is to the weight as 1 to 2. Prop. 12. In a system in which the same string passes round any numher of pulleys and the parts of it hetween the pulleys are parallel, there is an equilihrium when... | |
 | William Whewell - 1837 - 226 pages
...equilibrium : therefore, in the case of equilibrium, W is double of P, or P : W :: 1 : 2. * PftOP. XVIII. In a system in which the same string passes round...(W) :: 1 : the number of strings at the lower block. Let AC represent the system of pulleys; the string ABCDEFGH K passing round all the A pulleys, and... | |
 | Cambridge univ, exam. papers - 1847 - 40 pages
...rest. Is it possible for three forces represented by the numbers 1, 4, 7 to keep a point at rest? 4. In a system in which the same string passes round any number of pullies, and the parts of it between the pullies are parallel, there is equilibrium when W=-P x number... | |
 | University of Cambridge - 1849 - 560 pages
...where the strings are parallel, there is an equilibrium when the power is to the weight as 1 to 2. Prop. 12. In a system in which the same string passes round any num. ber of pulleys, and the parts of it between the pulleys are parallel, there is an equuibrium when... | |
 | Cambridge univ, exam. papers - 1856 - 252 pages
...in magnitude and direction by the sides of a triangle, act on a point, they will keep it at rest. 4. In a system in which the same string passes round...pulleys are parallel, there is an equilibrium when P : W :: l : the number of strings at the lower block. If the number of strings at the lower block... | |
 | Cambridge univ, exam. papers - 1856 - 200 pages
...other position of the lever. Why does this proposition not apply to the case of the Common Balance? 5. In a system in which the same string passes round...parts of it between the pulleys are parallel, there is equilibrium, when P : W:: 1 : n, where n is the number of strings at the lower block. Shew the advantages... | |
 | Frederic Carpenter Skey - 1858 - 768 pages
...moment's * It ii well to be aware of the actual amount of force which we employ in any given cane. When the same string passes round any number of pulleys, and the parts of it beween the pulleys are parallel —as in the apparatus commonly nsed for the reduction of dislocations... | |
 | University of Cambridge - 1864 - 694 pages
...where the strings are parallel, there is an equilibrium when the power is to the weight as 1 to 2. Prop. 12. In a system in which the same string passes round any number of pulleys, and trie parts of it between the pulleys are parallel, there is an equilibrium when power ( P) : weight... | |
 | Thomas Lund - Hydrostatics - 1864 - 188 pages
...Art. 41, P : W+w :: 1 : 2, or W+v>=2P; W w and therefore the mechanical advantage is diminished. 17. In a system, in which the same string passes round any number of pulleys (Prop, XII), and the parts of it between the pulleys are parallel, if the weight of the pulleys be... | |
| |
Definition of Pulley. Prop. 11. In the single moveable pulley where the strings are parallel, there is an equilibrium when the power is to the weight as 1 to 2. Prop. 12. In a system in which the same string passes round any number of pulleys and the... 
