An Elementary Treatise on Mechanics: Embracing the Theory of Statics and Dynamics, and Its Applications to Solids and FluidsHarper, 1855 - 307 pages |
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Common terms and phrases
accelerating force action angle applied apsis axes axis axle beam body moves center of gravity centrifugal force circle co-ordinates components concurring forces conditions of equilibrium constant force cord couple curve cycloid density descend determine displaced fluid distance dt² earth elastic equal and opposite equation equilibrium feet fixed point fluid force of gravity force varies forces acting friction fulcrum given Hence horizontal impact inclined plane inertia Integrating length lever magnitude mass moment of inertia motion orbit P₁ P₂ parallel forces parallelogram particle pendulum perpendicular point of application polygon position pressure PROP pulley radius of gyration ratio represent resolved resultant SCHOL seconds sides space described substituted surface tension tion triangle v₁ versin vertical line vessel vibration virtual velocities weight wheel νμ
Popular passages
Page 6 - If two forces be represented in magnitude and direction by the two adjacent sides of a parallelogram, the diagonal will represent their resultant in magnitude and direction.
Page 141 - If an iron rod have one end against the sun and the other resting on the earth, the distance of the sun from the earth being 95,125,000 miles, in what time will a blow applied to the end on the earth be felt by the sun, the velocity of an impulse in iron being 11,865 feet per second ? Ans. 490 days. Ex. 2. When the earth is in that part of its orbit nearest to Jupiter, an eclipse of one of Jupiter's satellites is seen 16 minutes 36 seconds sooner than it would be if the earth were in that part of...
Page 129 - A beam, 30 feet long, balances itself on a point at one-third of its length from the thicker end ; but when a weight of 10 Ibs. is suspended from the smaller end, the prop must be moved 2 feet towards it, in order to maintain the equilibrium. Find the weight of the beam.
Page 13 - ... components. By compounding the resultant R with a third force, we should obtain a like result. In the same manner, the proposition may be extended to any number of forces. 33. COR. 2. If the origin of moments be a fixed point, and taken in the direction of the resultant, On will become zero, and...
Page 171 - Find the straight line of quickest descent from a given point to a given straight line, the point and the line being in the same vertical plane.
Page 9 - If any number of forces acting at a point can be represented in magnitude and direction by the sides of a POLYGON taken in order, they are in equilibrium.
Page 248 - V:V^p:o; or the whole volume of the solid is to the part immersed as the density of the fluid is to the density of the solid. COR. 2. If the centers of gravity of the solid and displaced fluid be not in the same vertical line, the body will be acted upon by two parallel forces in opposite directions, and will cause the body to turn round. The point of application of the resultant of these forces may be found by Art. 29. 391. DBF. The section of a floating body made by a plane coincident with the...
Page 46 - STATICS. same distance from the plane, and their moments will be equal and have contrary signs. But all the particles, taken two and two, are thus placed (Art. 96). Therefore the resultant of the system of forces will be in that plane, and, consequently, the center of gravity also. 98. DBF. A body is said to be symmetrical with respect to an axis when it is symmetrical with respect to two planes passing through that axis. 99. PROP. The center of gravity of a homogeneous body, symmetrical with respect...
Page 1 - Hydrodynamics investigates the effects of forces on fluids when motion results.* 2. Force is that which produces or tends to produce motion or change of motion.
Page 164 - For in this case 2a=90°, and sin. 2a=l. .-. x=2h. or the greatest horizontal range is equal to twice the height due to the velocity of projection, or twice the distance from the point of projection to the focus of the trajectory. COR. 2. The range is the same for any two angles of elevation, the difference between which and 45° is the same, or for (45±0). For sin. (90°+20)=sin. (90°-20), or sin.