Natural philosophy. Mechanics, Τόμος 1Murby, 1873 |
Αναζήτηση στο βιβλίο
Αποτελέσματα 1 - 5 από τα 23.
Σελίδα 7
... feet per second will be represented by a line three times as long as the assumed unit . Velocities are of several kinds . Uniform1 Velocity . - When a body continues to move over equal units of length in equal units of time , its ...
... feet per second will be represented by a line three times as long as the assumed unit . Velocities are of several kinds . Uniform1 Velocity . - When a body continues to move over equal units of length in equal units of time , its ...
Σελίδα 11
... feet . The space which it passes over may be represented by the area of the rectangle O P Q A. Let the velocity be now increased , and for the next two seconds let the particle move at the rate of six feet per second . A representation ...
... feet . The space which it passes over may be represented by the area of the rectangle O P Q A. Let the velocity be now increased , and for the next two seconds let the particle move at the rate of six feet per second . A representation ...
Σελίδα 13
... feet , and will acquire a velocity of 32-2 feet . That is to say , if the body were removed from the action of gravity at the end of the first second , it would , during each succeeding second , pass through 32.2 feet . this space is ...
... feet , and will acquire a velocity of 32-2 feet . That is to say , if the body were removed from the action of gravity at the end of the first second , it would , during each succeeding second , pass through 32.2 feet . this space is ...
Σελίδα 40
... feet , which constitute their bases . A man feeling himself to be falling , unconsciously puts out his foot , thereby enlarging his base , and so bringing his C G above it . A man walking along an inclined path must bring his CG to the ...
... feet , which constitute their bases . A man feeling himself to be falling , unconsciously puts out his foot , thereby enlarging his base , and so bringing his C G above it . A man walking along an inclined path must bring his CG to the ...
Σελίδα 45
... product of the virtual velocity by the force , is called the virtual moment . Suppose a weight of 20 pounds to move over 2 feet in 1 L. , virtualis , potential . a given time , its virtual moment is 20x2 = STATICS . 45.
... product of the virtual velocity by the force , is called the virtual moment . Suppose a weight of 20 pounds to move over 2 feet in 1 L. , virtualis , potential . a given time , its virtual moment is 20x2 = STATICS . 45.
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...