 | John Rowning - Astronomy - 1744 - 470 pages
...of the Power will be quadruple to that of the Weight, or as four to one, &c. In all Cafes therefore when the Power is to the Weight, as one to the Number of Ropes paffing from the upper to the lower Pullies (§. 7.) there will be an ^Equilibrium. XVI. IF the Pullies... | |
 | John Rowning - Astronomy - 1753 - 476 pages
...motion therefore of P ($. 7.) will be ecjual to that of W. From whence the Propofujon is clear. Power Power is to the Weight, as one to the number of Ropes, that pafs between the upper and Jower Pullies. SUPPOSE one end of the Rope fixed in B (Fig. 29.) the... | |
 | William Enfield - Astronomy - 1811 - 476 pages
...moveable about its axis, by means of a cord, which passes over it* PROP. PROP. LIV. When the axis of the pulley is fixed, the pulley only changes the direction of the power ; if moveable pullies are used, an equilibrium is produced, where the power is to the weight as one to the... | |
 | Mathematics - 1836 - 488 pages
...between the weight and the fulcrum. When the forces act perpendicularly to the arms of a straight lever, an equilibrium is produced, when the power is to the weight as the distance of the weight from the prop is to the distance of the power from the prop. In the first... | |
 | Denison Olmsted - Physics - 1837 - 374 pages
...let W be a weight drawn up this plane by a power applied at P, and acting parallel to the plane. Then an equilibrium is produced, when the power is to the weight, as the height of the plane to its length. 162. The inclined plane becomes a mechanical power in consequence... | |
 | Denison Olmsted - Physics - 1838 - 376 pages
...continued in the Fig. 96. same manner. By Art. 131, when the power acts parallel to the base of the plane, an equilibrium is produced when the power is to the weight as the height of the plane to its base; or, applied to the screw, an equilibrium is produced, when the... | |
 | Benjamin Greenleaf - Arithmetic - 1839 - 356 pages
...PULLEY. The pulley is a small wheel, movable about its axis by means of a cord, which passes over it. When the axis of a pulley is fixed, the pulley only...them. If each movable pulley has its own rope, each pulley will be double the power. To find the weight, that may be raised by a given power. RULE. —... | |
 | Calvin Tracy - Arithmetic - 1840 - 326 pages
...which a gain in power is effected. A double movable pulley is represented at fig. 2. By such a pulley an equilibrium is produced, when the power is to the weight, as one to the number of ropes sustaining the weight. If a single movable pulley be employed, the weight is sustained by two ropes... | |
 | Calvin Tracy - Arithmetic - 1840 - 316 pages
...the weight to the axle, when an increase of action is to be gained. In the use of the wheel and axle, an equilibrium is produced, when the power is to the weight as the semi-diameter of the axle is to the semi-diameter of the wheel. Prob. 25. Given the diameter of... | |
 | Charles Guilford Burnham - Arithmetic - 1841 - 324 pages
...PULLEY. The pulley is a small wheel, movable about its axis by means of a cord, which passes over it. When the axis of a pulley is fixed, the pulley only...them. If each movable pulley has its own rope, each pulley will be double the power. THE SCREW. The number of movable pulleys and the power given, to find... | |
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The pulley is a small wheel, movable about its axis by means of a cord, which passes over it. When the axis of a pulley is fixed, the pulley only changes the direction of the power ; if movable pulleys are used, an equilibrium is produced, when the power... 
