Principles of Mechanics |
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action angle angle of repose angular velocity apparatus axis axle balance beam body Boyle's law bullet centre of gravity coefficient of friction compressed curve cylinder depth described diagram diameter direction disc distance drawing energy engine equal equilibrium falling feet per second fluid foot-pounds forces acting friction fulcrum heat Hence inches of mercury inclined inclined plane increase iron length lever lifting linear velocity liquid load mass measure mechanical mercury minute molecules motion moving P₁ particles perpendicular pipe piston plunger pound weight pounds pressure principle Prop pull pulley pump quantity radius represented resistance rest resultant revolutions per minute rotation round Science Exam screw shaft side space specific gravity square inch steam straight line string supported surface tons triangle tube valve vertical vessel weight wheel
Popular passages
Page 16 - Every body continues in its state of rest or of uniform motion in a straight line, except in so far as it may be compelled by impressed forces to change that state.
Page 81 - If any number of forces acting on a point be represented in magnitude and direction by the sides of a polygon, taken in order, they will be in equilibrium.
Page 206 - Def. The specific gravity of a solid or liquid substance is the ratio of its density to that of water, or, in other words, it is the ratio of the weight of a given volume of the substance to that of an equal volume of water. The water is distilled, and the temperature is 60° F. Def. The specific gravity of a gas is the ratio of the weight of a given volume of the gas to that of an equal volume of air at the same temperature and pressure. The standard temperature is 60° F., and the pressure is that...
Page 41 - To every action there is always an equal and contrary reaction ; or the mutual actions of any two bodies are always equal and oppositely directed.
Page 32 - Combining the formula 5 = \gt- and v = gt, we have or?'2 = 2^5, . . . (4) which formula gives the velocity acquired in falling through a given space, or connects the space from rest and the velocity. GRAVITATION UNITS OF FORCE AND MASS. 21. We have spoken of the gravitation measure of force as that wherein a force which will support w pounds of matter is called a force of w pounds ; and we now define the units of force and mass in order that the student may be able to compare the absolute and gravitation...
Page 90 - Prop. To find the conditions of equilibrium of any number of forces acting in one plane upon different points of a rigid body.
Page 79 - If three forces, acting at a point, be represented in magnitude and direction by the sides of a triangle taken in order, they will be in equilibrium...
Page 172 - That the quantity of heat produced by the friction of bodies, whether solid or liquid, is always proportional to the quantity of force expended.
Page 206 - The specific gravity of a petroleum oil and of mixtures of petroleum products with other substances is the ratio of the weight of a given volume of the material at a temperature of 60° F.