 | Great Britain. Education Department. Department of Science and Art - 1886 - 640 стор.
...lever be 30 Ibs., what weight can be lifted (neglecting friction)? (Take *• = 3' 1416.) (15.) 6. A barrel weighing 5 cwt. is lowered into a cellar...pay out the other ends of the ropes. What pull in pounds must each man exert in order that the barrel may be supported at any point ? (15.) 7. What is... | |
 | Thomas Minchin Goodeve - 1891 - 392 стор.
...Ibs. , what weight can be lifted (neglecting friction)? (Take is = 3-1416.) Ans. 3769 '92 Ibs. 123. A barrel weighing 5 cwt. is lowered into a cellar...one end of each rope being fixed, while two men pay oat the other ends of the ropes. What pull in pounds must each man exert in order that the barrel may... | |
 | Thomas Minchin Goodeve - 1891 - 392 стор.
...Ibs. , what weight can be lifted (neglecting friction)? (Take ir = 3 -1416.) Ans. 3769 '92 Ibs. 123. A barrel weighing 5 cwt. is lowered into a cellar...one end of each rope being fixed, while two men pay oat the other ends of the ropes. What pull in pounds must each man exert in order that the barrel may... | |
 | Andrew Jamieson - 1892 - 300 стор.
...explain the mechanical principles that are here applied, and find the advantage. Ans. 2 v2 : I. 1 1 . A barrel weighing 5 cwt. is lowered into a cellar down a smooth slide inclined at an angle of 45 degrees with the vertical. It is lowered by means of two ropes passing under the barrel, one end of... | |
 | A. L. Selby - 1893 - 328 стор.
...order that it may be on the point of moving up the plane, the coefficient of friction being \ ? 11. A barrel weighing 5 cwt. is lowered into a cellar down a smooth slide inclined at 45° to the vertical. It is lowered by two ropes passing under the barrel, one end of each rope being... | |
 | Andrew Jamieson - 1894 - 350 стор.
...explain the mechanical principles that are here applied, and find the advantage. An». 2 »/2 : I. 1 1 . A barrel weighing 5 cwt. is lowered into a cellar down a smooth slide inclined at an angle of 45 degrees with the vertical. It is lowered by means of two ropes passing under the barrel, one end of... | |
 | Thomas Wallace Wright - 1896 - 418 стор.
...down a smooth slide inclined at 45° to the vertical. It is lowered by two ropes passing under it, one end of each rope being fixed, while two men pay out the other ends. Find the pull exerted by each man. Ans. 100/ 4/2 pounds. 6. Find the force required to haul a train... | |
 | Andrew Jamieson - 1898 - 370 стор.
...barrel weighing 5 cwt. is lowered into a cellar down a smooth slide inclined at an angle of 45 degrees with the vertical. It is lowered by means of two ropes...order that the barrel may be supported at any point 1 (S. and A. Exam. 1889.) Ant. 99 Ibs. nearly. LECTTTRE X. CONTENTS. — Friction — Heat Is Developed... | |
 | Andrew Jamieson - 1902 - 414 стор.
...explain the mechanical principles that are here applied, and find the advantage. Ann. 2 ^2 : i. 1 1. A barrel weighing 5 cwt. is lowered into a cellar down a smooth slide inclined at an angle of 45 degrees with the vertical. It is lowered by means of two ropes passing under the barrel, one end of... | |
 | Andrew Jamieson - 1904 - 410 стор.
...explain the mechanical principles that are here applied, and find the advantage. Ant. 2 v'2 : I. 1 1. A barrel weighing 5 cwt. is lowered into a cellar down a smooth slide Inclined at an angle of 45 degrees with the vertical. It is lowered by means of two ropes passing under the barrel, one end of... | |
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... with the vertical. It is lowered by means of two ropes passing under the barrel, one end of each rope being fixed, while two men pay out the other ends of the ropes. What pull in Ibs. must each man exert in order that the barrel may be supported at... 