Lessons in Applied MechanicsMacmillan, 1891 - 512 σελίδες |
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
action actual angular velocity applied backstay beam bearing bending body called centre circle coefficient compression connecting rod consider constant crank effort crank pin crank position curve cylinder diagram diameter distance draw effect elastic elastic limit Energy exerted engine equal equation example feet flange foot length forces friction ft.-lbs girder given hence inch indicator diagram joint length lift load machine mean mean effective pressure measure moment of inertia moving neutral axis obtained ordinates parallel piece pipe plane plate preceding pressure produced pull pulley radius represent resistance result revolutions revolutions per minute right angles rivet rope rotating scale screw sectional area shaft shearing shearing stress shown simple sliding pair speed steam stroke surface tension tons turning pair velocity ratio W₁ wasted weight wheel whence whole
Δημοφιλή αποσπάσματα
Σελίδα 2 - Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area.
Σελίδα 370 - Prove also that the moment of inertia of a thin plate about an axis at right angles to its plane is equal to the sum of the moments of inertia about two mutually perpendicular axes concurrent with the first and lying in the plane of the thin plate.
Σελίδα 280 - This subject is further subdivided into statics and kinetics of a particle according as the particle is or is not in equilibrium under the forces. The condition for equilibrium is that the sum of the resolved parts of the forces in any direction is zero ; but, because of the...
Σελίδα 281 - The bending moment on any section through a beam is the algebraic sum of the moments of all the forces on the beam on either side of the section about an axis in the plane of the section through its centroid.
Σελίδα 254 - From (23), the centrifugal pressure on the fixed axis of any rigid body is the same as if the whole mass were concentrated at the mass-centre G.
Σελίδα 157 - D2 dv and the same operation be repeated for a series of different positions of the crank, all these points will be found to lie on the polar curve, O o?2 C,.
Σελίδα 8 - ... equal to the rectangle contained by the segments into which it divides the opposite side. 53. O is a point outside a circle whose centre is E ; two perpendicular lines passing through O intercept chords AB, CD on the circle; then AB
Σελίδα 133 - ... ins. and diameter of barrel 8 ins. The pinion on the same axis as the handle has 16 teeth, and gears with the spur wheel connected to the barrel which has 90 teeth. What weight can one man exerting a push of 30 Ibs. lift? 7. The preceding is fitted to act with an increased velocity ratio by sliding the pinion out of contact with the spur wheel, and putting in gear a pinion of 18 teeth working with a spur wheel of 54 teeth. On the axis of the latter is another pinion of 18 teeth which now drives...
Σελίδα 276 - An iron bar 18 feet long, 1j in. diameter, is heated to 400° F. ; nuts on its ends are then screwed up so as to bear against the walls of a house which have fallen away from the perpendicular. Find the pull on the walls when the bar has cooled to 300° F.
Σελίδα 458 - Oct., 1902.) 9. & crane has a vertical crane-post, AB, 8 feet long, and a horizontal tie, BC, 6 feet long, AC being the jib. It turns in bearings at A and B, and the chain supporting the load passes over pulleys at C and A, and is then led away at 30° to A B. Find the stresses in the bars and thrusts on the bearings when lifting 1 ton at a uniform rate. (ICE, Feb., 1903.) NB — See Appendices B and C for other questions and answers.