 | John Charles Snowball - 1838 - 114 pages
...: 2n :: 1 : number of strings at the lower block. Wherefore, " In a system, &c." QED 34. THE SECOND SYSTEM OF PULLEYS; — in which each pulley hangs by a separate string. PBOP. xin. In a system where each pulley hangs by a separate string and the strings are parallel, there... | |
 | W F. Richards - 1856 - 198 pages
...other : what is the real weight ? 2. What weight may be lifted by a force of 70 Ibs. acting through a system of pulleys, in which each pulley hangs by a separate string, there being 5 pulleys, and the friction of each pulley being } of the weight upon it ? 3. In a compound... | |
 | Thomas Lund - 1864 - 188 pages
...of the string on each side of it parallel. Prove that the height of the plane is half its length. 4. In the system of pulleys, in which each pulley hangs by a separate string, prove that P : W :: Ws velocity : P's velocity. What is meant by saying that in mechanism " what is... | |
 | Thomas Lund - 1864 - 204 pages
...boy, who can only lift 15 stone, bo enabled to raise 90 stone ? 5. Define Velocity. If p and w balance in the system of Pulleys, in which each pulley hangs by a separate string, and the whole be put in motion, shew thatp : to :: w's velocity in direction of gravity :p's velocity.... | |
 | John Kerr - 1866 - 358 pages
...w of the pulley is taken into account, we have 81. Prop. To find the relation between P and TF in a system of pulleys, in which each * pulley hangs by a separate string, one end being attached to the pulley next above and the other end fixed: all the strings being parallel.... | |
 | James Hamblin Smith - 1868 - 102 pages
...W, .'. 2P.cos0 = W is the condition of equilibrium. 22. To find the condition of equilibrium for a system of pulleys in which each pulley hangs by a separate string. In this system a string, acted on by the power P, passes round the pulley A, and is fastened to the... | |
 | Richard Wormell - 1869 - 270 pages
...certain angle, show that it is true for forces P and 2 Q acting at the same angle. (§ 22, 3rd.) 11. In a system of pulleys in which each pulley hangs by a separate string, and the strings are parallel, show that there is equilibrium when P is to W as 1 is to 2" where n is... | |
 | James Hamblin Smith - 1871 - 148 pages
...pulley. Neglecting the weights of the pulleys, find the power necessary to produce equilibrium. 5. In a system of pulleys in which each pulley hangs by a separate string there are 3 pulleys of equal weights. The weight attached to the lowest is 321bs., and the power is... | |
 | 1878 - 228 pages
...about that axis. 4. What is the object of a machine ? Find the relation between the power and the load in the system of pulleys in which each pulley hangs by a separate string, the pulleys being of the same weight and the strings parallel. Show that the principle of " virtual... | |
 | James Andrew Blaikie - 1878 - 184 pages
...far has it moved at the end of the second second 1 4. Find the ratio of the power to the weight in a system of pulleys, in which each pulley hangs by a separate string. 136 • 5. When a cannon is fired, explain carefully what takes place. If the cannon be free to move,... | |
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Find the ratio of the power to the weight, when there is equilibrium in the system of pulleys in which each pulley hangs by a separate string ; first, neglecting, secondly, taking account of the weights of the pulleys. 
