Applied Mechanics for Beginners |
Other editions - View all
Common terms and phrases
acceleration angle anticlockwise applied beam belt bending block body Calculate cast iron centre of gravity chain circumference clockwise coefficient of friction connecting rod cord crank pin cubic curve diagram diameter direction distance elastic limit engine equal equilibrium EXERCISES ON CHAP experiment Expt factor of safety feet per second flange foot forces acting frictional resistances ft.-lbs give given forces horizontal horse-power kinetic energy length load machine mass material measured mechanical advantage motion moving parallel parallelogram of forces perpendicular piece piston plate position pounds pressure produced proportional pull pulley pump push radius resultant revolutions per minute rivets rope rotate scale pan screw shaft shear stress shearing force shown in Fig sliding span speed square inch steel straight line supported Suppose surface teeth tensile stress tons per square torque velocity ratio vertical weight wheel wire wrought iron Young's modulus
Popular passages
Page 317 - Honours, but they must confine themselves to one of them. Put the number of the question before your answer. You are to confine your answers strictly to the questions proposed. Such details of your calculations should be given as will show the methods employed in obtaining arithmetical results. A table of logarithms and functions of angles and useful constants and formulae is supplied to each candidate.
Page 152 - What is friction ? What is meant by limiting friction, by sliding friction, and by the co-efficient of friction ? A weight of 5 cwts. resting on a horizontal plane, requires a horizontal force of 108 Ibs.
Page 110 - Vi in. (12.7 mm) in thickness, or those in which the distance from the edge of the hole to the edge of the angle is less than % in.
Page 53 - Ibs., and the distance from the centre of the valve to the fulcrum is 4-5 inches. What must be the length of the lever from the centre of the valve to the point of suspension of the weight, in order that the valve will just lift when the pressure of steam in the boiler is 80 Ibs. per square inch ? Neglect the weight of the lever and the valve.
Page 42 - It is measured by the product of the magnitude of the force and the length of the perpendicular dropped from the point upon the line of action of the force.
Page 266 - The bottom of a water tank measures / in length and 3' 4" in width, When the tank contains 900 gallons of water, what will be the depth of the water, and what would be the pressure on the bottom, on each side and end of the tank respectively?
Page 233 - A train weighing 250 tons is moving at 40 miles per hour and is stopped in 10 seconds.
Page 194 - A, B, C are on parallel axes, and are in gear. A has 10 teeth, B has 35 teeth, and C has 55 teeth. How many revolutions upon its axis will be made by A for every 4 revolutions of C ? Why is B called an idle, wheel, and what is its use ? (10.) 3.
Page 90 - E ; for shearing stress, as the modulus of transverse elasticity, or C ; for bulk compression, as the modulus of bulk compressibility, or K. Bending Moment. — The bending moment at any section of a beam is the algebraic sum of all the external forces acting on the beam on either side of the section, multiplied by their respective distances from the section. Moment of Resistance. — The moment of resistance of a beam at any section is the combination of internal forces brought into play to resist...
Page 210 - I ton. What force is exerted on the rope in your arrangement ? Explain the mode of arriving at this numerical result by the principle of work. (S. and A. Exam. 1891.) Ans. With 3 pulleys in upper block and 2 in lower block, P = 448 Ibs. 7. A tackle is formed of two blocks, each weighing 15 Ibs., the lower one being a single movable pulley, and the upper or fixed block having two sheaves ; the parts of the cord are vertical, and the standing end is fixed to the movable block ; what pull on the cord...