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Σελίδα 21 - ... is equal to the sum of the moments of the forces which tend to turn the body in the opposite direction about the same point.
Σελίδα 11 - The work done by a force is measured by the product of the force into the distance through which that force moves in its own direction.
Σελίδα 256 - ... the ratio of the mass of a given volume of the substance to the mass of an equal volume of water, in which case it is equal to the specific gravity. In its application to gases, the term
Σελίδα 147 - Ibs. 6. In a crane there is a train of wheelwork, the first pinion being driven by a lever handle ; and the last wheel being on the same axis as the chain barrel of the crane. The wheelwork consists of a pinion of 1 1 gearing with a wheel of 92, and of a pinion of 12 gearing with a wheel of 72, the diameter of the barrel being 18 inches and that of the circle described by the end of the lever handle being 36 inches ; find the ratio of the pull to the weight raised, friction being neglected.
Σελίδα 240 - The unit of surface is the square centimetre. Volume. — The unit of volume is the cubic centimetre. Velocity. — The unit of velocity is the velocity of a body which moves through unit distance in unit time, or one centimetre per second.
Σελίδα 326 - Put the number of the question before your answer. You are to confine your answers strictly to the questions proposed. Your name is not given to the Examiner, and you are forbidden to write to him about your answers.
Σελίδα 23 - The resultant of two forces applied at the same point, and acting in the same direction, is equal to the sum of the forces.
Σελίδα 91 - A rectangular trap-door measuring 4 feet square and weighing 75 Ibs. is hinged with one edge horizontal, and is supported in the horizontal position by a chain which is connected -with the middle point of the outer edge of the trap-door, and with a point vertically over the middle point of the edge in which the hinges are fixed, but 7 feet above it Sketch the arrangement, and determine the tension upon the chain and the reaction on the hinges.