 | Mrs. Marcet (Jane Haldimand) - 1821 - عدد الصفحات: 350
...but when the ball is thrown perpendicularly upwards, it will descend perpendicularly ; because the force of projection, and that of gravity, are in the...exactly balance each other ; if therefore that point is supported, the body will not fall. Do you understand this ? Emily. I think so ; if the parts round... | |
 | Mrs. Marcet (Jane Haldimand), John Lauris Blake - 1826 - عدد الصفحات: 308
...but when the ball is thrown perpendicularly upwards, it will descend perpendicularly ; because the force of projection, and that of gravity, are in the same line of direction^ Emily. I think so ; if the parts round about this point have an equal tendency to fall, they will be... | |
 | 1832 - عدد الصفحات: 650
...Hut when the ball is thrown perpendicularly upwards, it will descend perpendicularly ; because the force of projection, and that of gravity, are in the...noticed the centres of magnitude and of motion, but we have not yet explained what is meant by the centre of gravity. It is that point about which all... | |
 | 1832 - عدد الصفحات: 640
...But when the ball is thrown perpendicularly upwards, it will descend perpendicularly ; because the force of projection, and that of gravity, are in the same line of direction. We have noticed the centre» of magnitude and of motion, but we have not yet explained what is meant by the centre of gravity.... | |
 | Mrs. Marcet (Jane Haldimand), John Lauris Blake - 1836 - عدد الصفحات: 540
...parabola. But when the ball is thrown perpendicularly upwards, it will descend perpendicularly; because the force of projection, and that of gravity, are in the...is meant by the centre of gravity. It is that point about which all the parts of a body exactly balance each other; if, therefore, that point be supported,... | |
 | Richard Green Parker - 1838 - عدد الصفحات: 266
...but when it Fi «- 14 is thrown perpendicularly upward, it will descend perpendicularly, because the force of projection and that of gravity are in the same line of direction. * The science of gunnery is founded upon the laws relating to projectiles. The force of gnnpowder 13... | |
 | Jane Marcet - 1839 - عدد الصفحات: 544
...parabola. But when the ball is thrown perpendicularly upwards, it will descend perpendicularly; because the force of projection, and that of gravity, are in the...is meant by the centre of gravity. It is that point about which all the parts of a body exactly balance each other ; if, therefore, that point be supported,... | |
 | Richard Green Parker - 1844 - عدد الصفحات: 276
...14.] but when it Fis- uis thrown perpendicularly upward, it will descend perpendicularly, because the force of projection and that of gravity are in the same line of direction. s The science of gnunery is founded opon the laws relating to projectiles. The force of gnnpowder is... | |
 | George Grant - 1849 - عدد الصفحات: 328
...parabola. But when the ball is thrown perpendicularly upwards, it will descend perpendicularly; because the force of projection, and that of gravity, are in the same line of direction. We noticed the centres of magnitude and of motion, but we have not as yet explained what is meant by the... | |
 | Richard Green Parker - 1849 - عدد الصفحات: 418
...it is Fi«-15thrown perpendicularly upwards or downwards, it will move perpendicularly, because the force of projection and that of gravity are in the same line of direction. * The science of gunnery is founded upon the laws relating to projectiles. The force of gunpowder is... | |
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The curve-line which the ball has described, is called in geometry, a parabola; but when the ball is thrown perpendicularly upwards, it will descend perpendicularly ; because the force of projection, and that of gravity, are in the same line of direction.... 
