Natural philosophy. Mechanics, Τόμος 1Murby, 1873 |
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Αποτελέσματα 1 - 5 από τα 87.
Σελίδα vi
... Weight of Levers . 57 Rules . 57 Method of Finding Centre of Gravity 36 Stable and Unstable Equili- brium . 38 CHAP . VII . THE MECHANICAL POWERS ( continued ) . Neutral Equilibrium 39 2 ( a ) . The Wheel and Axle . • · Inclined Planes ...
... Weight of Levers . 57 Rules . 57 Method of Finding Centre of Gravity 36 Stable and Unstable Equili- brium . 38 CHAP . VII . THE MECHANICAL POWERS ( continued ) . Neutral Equilibrium 39 2 ( a ) . The Wheel and Axle . • · Inclined Planes ...
Σελίδα 9
... weight is suspended from an iron bar , the particles of the rod are torn asun- der , as it were , and the rod becomes longer . In the same way , if a heavy weight is supported by a bar , its particles are forced together . All these are ...
... weight is suspended from an iron bar , the particles of the rod are torn asun- der , as it were , and the rod becomes longer . In the same way , if a heavy weight is supported by a bar , its particles are forced together . All these are ...
Σελίδα 20
... weight . Hence a force of six pounds is said to be twice as great as a force of three pounds . Statical forces are therefore measured by the pressure they exert . Equal Forces . - Forces are said to be equal if their intensities are ...
... weight . Hence a force of six pounds is said to be twice as great as a force of three pounds . Statical forces are therefore measured by the pressure they exert . Equal Forces . - Forces are said to be equal if their intensities are ...
Σελίδα 29
... weight , G , equal to their sum , by a cord passing over a pulley , F , and fastening the cord to the point E , so that CE : ED as the weight B : the weight A. The system will then be found to remain in equilibrium . To find the length ...
... weight , G , equal to their sum , by a cord passing over a pulley , F , and fastening the cord to the point E , so that CE : ED as the weight B : the weight A. The system will then be found to remain in equilibrium . To find the length ...
Σελίδα 33
... weight of the machine , and other resistances have to be overcome in addition to the weight to be moved , the employment of machines , instead of diminishing , has really the effect of augment- ing the force necessary to overcome a ...
... weight of the machine , and other resistances have to be overcome in addition to the weight to be moved , the employment of machines , instead of diminishing , has really the effect of augment- ing the force necessary to overcome a ...
Άλλες εκδόσεις - Προβολή όλων
Natural Philosophy: Part 1, Mechanics (1873) J. Alfred Skertchly Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2008 |
Συχνά εμφανιζόμενοι όροι και φράσεις
acceleration angle of repose attached axis beam body moves called central force centre of gravity centrifugal force circle circumference continuous circular motion curve cylinder descend diameter direction distance earth effect equal equilibrium exerted falling body feet per second fixed point foot-pounds force of gravity forces acting friction fulcrum Hence horizontal impact inches inclined plane isochronous kinetic energy length lever lifted machine mechanical efficiency miles per hr movable block multiplied number of seconds number of units oscillation parabola parallel forces parallelogram particle passive force path perpendicular pitch position pounds pounds weight pressure produce projectile proportional pulley radii radius raise ratio rectilinear motion represent resistance rest resultant revolution revolve rope passing round screw sheave simple pendulums space square stone surface suspended teeth tons triangle upper block velocity vertical vibrate wedge wheel and axle
Δημοφιλή αποσπάσματα
Σελίδα 41 - Newton's Three Laws of Motion," and are as follows: (1) All bodies continue in a state of rest, or of uniform motion in a straight line, unless acted upon by some external force that compels a change.
Σελίδα 15 - To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides "by the perpendicular distance between them : the product will be the area.
Σελίδα 87 - This proportion teaches us that, when in equilibrium, the power is to the weight as the height of the plane is to its length.
Σελίδα 41 - First. A body in motion, and not acted upon by any external force, will move with a uniform velocity in a straight line.
Σελίδα 59 - There is an equilibrium upon the wheel and axle when the power is to the weight as the radius of the axle to the radius of the wheel.
Σελίδα 48 - Hence it is evident, that in every species of lever there will be an equilibrium, when the power is to the weight as the distance of the weight from the fulcrum is to the distance of the power from the fulcrum.
Σελίδα 32 - The perpendicular distance between the lines of action of the two forces is called the arm, and the product of one of the forces and the arm is called the moment of the couple.
Σελίδα 134 - The force is proportional to the square of the velocity and inversely proportional to the radius of turn during radial acceleration.
Σελίδα 46 - These machines are ; 1. the lever; 2. the wheel and axle ; 3. the pulley ; 4. the inclined plane ; 5. the wedge ; and 6. the screw.
Σελίδα 28 - 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...