Natural philosophy. Mechanics, Volume 1Murby, 1873 |
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Common terms and phrases
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
Popular passages
Page 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.
Page 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.
Page 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.
Page 41 - First. A body in motion, and not acted upon by any external force, will move with a uniform velocity in a straight line.
Page 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.
Page 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.
Page 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.
Page 134 - The force is proportional to the square of the velocity and inversely proportional to the radius of turn during radial acceleration.
Page 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.
Page 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...