Elementary staticsRivingtons, 1883 - 130 σελίδες |
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AC represent acting at right acting horizontally acting parallel angle of 30 angular points applied arms attached axle balance base beam bisects the angle called centre of gravity Complete the parallelogram component forces condition of equilibrium diagonal direction Ax distance equal and opposite equal forces equal weight find the centre Find the magnitude Find the position fixed point forces acting forces represented FRANCIS STORR fulcrum Hence inches inclined plane line joining line of action lower block magnitude and direction Marlborough College mechanical advantage middle point number of forces parallel forces Parallelogram of Forces perpendicular placed pressure quadrilateral radius represented in magnitude rest rhombus right angles rope screw shew similar triangles single force steelyard straight lever straight line suppose suspended system of pulleys tension three forces triangle AOB Trigonometry units of force units of length vertex vertical line wheel Winchester College
Δημοφιλή αποσπάσματα
Σελίδα 26 - IV. // 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 will be in equilibrium.
Σελίδα 71 - Evidently the tendency depends on the magnitude of the force and on the perpendicular distance of the line of action of the force from the point...
Σελίδα 106 - ... and a man in the basket support himself and the basket, by pulling at the free end of the string, find the tension he exerts, neglecting the inclination of the string to the vertical, and assuming the weight of the man and basket to be W. 6. A man, whose weight is 12 stone, raises 3 cwt. by means of a system of pulleys in which the same string passes round all the pulleys, there being 4 in each block, and the string being attached to the upper block; neglecting the weights of the pulleys, find...
Σελίδα 59 - When a body is suspended from a point, it will rest with its centre of gravity in the vertical line passing through the point of suspension.
Σελίδα 77 - Prove that the sum of the moments of two forces in a plane about any point in their plane is equal to the moment of their resultant about that point.
Σελίδα 56 - To find the centre of gravity of a plane triangle. Let ABC be a plane triangular lamina of matter. We may suppose this triangle to be made up of a series of lines of particles running parallel to one of the sides, as BC. Let bc be one of these lines.
Σελίδα 29 - 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.
Σελίδα 29 - If any number of forces, acting at a point, can be represented in magnitude and direction &«/ the sides of a polygon taken in order, they will be in equilibrium.
Σελίδα 4 - Method of representing forces. Forces may be represented by straight lines: for (1) A straight line can be drawn from any point, and thus it will represent a force with respect to the point of application. (2) A straight line can be drawn in any direction, and thus it will represent the direction of a force. (3) A straight line can be drawn of such a length as to contain as many units of length as the given force contains units of force, and thus it will represent the magnitude of a force. Thus,...