A First StaticsJ. M. Dent & Company, 1907 - 372 páginas |
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Termos e frases comuns
12 inches ABCD angle of friction attached axis axle beam block centre of gravity chain coefficient of friction cord couple cwts cylinder diagonal diameter direction disc distance Draw equations EXAMPLES experiment fastened feet long figure Find the position Find the tension fixed foot force applied force diagram force of friction forces acting frame fulcrum hinged horizontal force horizontal plane hung inches long inclined plane joint length lever lifting force line of action link polygon load mechanical advantage middle point move number of forces parallel forces parallelogram parallelogram of forces position of equilibrium pressure pull pulley radius rafters ratio represent rests right angles rigid body rope round scale-pan screw Show sides smooth spring balance square straight line string supported Suppose surface suspended thread three forces tons turn uniform rod vertical force vertical plane W₁ W₂ weight wheel wire
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Página 5 - Whatever draws or presses another is as much drawn or pressed by that other. If you press a stone with your finger, the finger is also pressed by the stone.
Página 182 - I Corpus omne perseverare in statu suo quiescendi vel movendi uniformiter in directum, nisi quatenus illud a viribus impressis cogitur statum suum mutare.
Página 5 - ... to relax or unbend itself, will draw the horse as much towards the stone as it does the stone towards the horse, and will obstruct the progress of the one as much as it advances that of the other.
Página 370 - Prove that the algebraic sum of the moments of two concurrent forces about any point in their plane is equal to the moment of their resultant about the same point.
Página 99 - Theorem is that the sum of the moments of two forces about any point is equal to the moment of their resultant about that point.
Página 82 - Law of Sines — In any triangle, the sides are proportional to the sines of the opposite angles. That is, sin A = sin B...
Página 225 - The area of a surface of revolution generated by revolving a plane curve about any non-intersecting axis in its plane is equal to the product of the length of the curve and the length of the path described by the centroid of the curve.
Página 21 - A pendulum carrying a weight at its end is allowed 'to swing against the specimen and, owing to the weakening effect of the notch, the bar fractures at the notch. The energy possessed by the falling weight is known, since it is measured by the product of the weight and the vertical height through which it has. fallen. By means of a small pointer p the position to which the pendulum swings after hitting the specimen is indicated (Fig.
Página 362 - A uniform ladder, 10 feet long, rests with one end against a smooth vertical wall and the other on the ground, the coefficient of friction between the ladder and the ground being J.
Página 239 - Ib. respectively act at a point in directions parallel to the sides of an equilateral triangle taken in order : find their resultant in magnitude and direction. 7. Define the centre of a system of parallel forces and state a rule for finding it. Masses of 1, 2, 3, 4 Ib. are placed at the corners A, B, C, D respectively of a square ABCD : find the distance of the centre of gravity of the four masses from the sides AB, AD. Find also where a mass of 5 Ib. must be placed so that the centre of gravity...