| Joseph Denison - Mechanics - 1841 - 210 pages
...equals by 2w, finding the power requisite to sustain any given weight by block-pulleys. Rule.—Divide the weight to be raised plus the weight of the lower...ton weight ? By theorem 1, (Single Moveable Pulley}, w 20 cwt. . P — -jj := —^— =10 cwt. or £ ton ; the answer. 2. With four moveable pulleys combined,... | |
| John E. Fuller - Ready-reckoners - 1846 - 82 pages
...10 ft. ; by 12 inches. = 300 Ibs. 20 inches. [Ans. PULLEY. RULE. — Divide the weight to be raised by twice the number of pulleys in the lower block ; the quotient will give the power necessary to raise the weight. EXAMPLE. — What power is required to raise 600 Ibs.,... | |
| Septimus Norris - Locomotives - 1852 - 356 pages
...Ibs- x 10 feet x 12 inches 2Q inches- - = 300 Ibs-, Ans* PULLEYRULE — Divide the weight to be raised by twice the number of pulleys in the lower block ; the quotient will give the power necessary to raise the weightEXAMPLE — What power is required to raise 600 Ibs-, when... | |
| Frederick Augustus Griffiths - Artillery drill and tactics - 1854 - 406 pages
...and it should enter easily into the grooves of the sheaves. Rule. — Divide the weight to be raised by twice the number of pulleys in the lower block ; the quotient will give the power necessary to raise the weight. Example. — What power is required to raise 600 Ib.,... | |
| Charles Haslett - 1855 - 544 pages
...product of the power and twice the number of movable pulleys. RULE. Divide the weight to be raised by twice the number of pulleys in the lower block ; the quotient will give the power necessary to raise the weight. EXAMPLE. Required the power to raise 600 Ibs. when the... | |
| Charles W. Hackley - Engineering - 1856 - 530 pages
...product of the power and twice the number of movable pulleys. RULE. Divide the weight to be raised by twice the number of pulleys in the lower block; the quotient will give the power necessary to raise the weight. ''. EXAMPLE. Required the power to raise 600 Ibs. when... | |
| Charles Haslett, Charles William Hackley - Engineering - 1859 - 574 pages
...product of the power and twice the number of movable pulleys. RULE. Divide the weight to be raised by twice the number of pulleys in the lower block ; the quotient will give the power necessary to raise the weight. EXAMPLE. Required the power to raise 600 Ibs. when the... | |
| Frederick Augustus Griffiths - Artillery - 1859 - 426 pages
...and it should enter easily into the grooves of the sheaves. Rule. — Divide the weight to be raised by twice the number of pulleys in the lower block ; the quotient will give the power necessary to raise the weight. Example. — What power is required to raise 600 lb.,... | |
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