Natural philosophy. Mechanics, Τόμος 1Murby, 1873 |
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Σελίδα 6
... miles an hour , and another train , B , has a motion of twenty miles an hour , we know that the motion of B is to that of A as 2 is to 1 ; or in other words , that B moves twice as fast as A. CHAPTER II . MOTION OF A POINT . Path ...
... miles an hour , and another train , B , has a motion of twenty miles an hour , we know that the motion of B is to that of A as 2 is to 1 ; or in other words , that B moves twice as fast as A. CHAPTER II . MOTION OF A POINT . Path ...
Σελίδα 7
... miles an hour , its velocity may be also expressed as one mile per minute , or eighty - eight feet per second . Accelerated Velocity . When a body moves over a greater number of units of length in each succeeding unit of time , the ...
... miles an hour , its velocity may be also expressed as one mile per minute , or eighty - eight feet per second . Accelerated Velocity . When a body moves over a greater number of units of length in each succeeding unit of time , the ...
Σελίδα 34
... miles apart in the first instance . It is the force of universal gravity which keeps the planets from flying off into space . The force in this case is called centri- petal , because it tends to draw the body towards the centre round ...
... miles apart in the first instance . It is the force of universal gravity which keeps the planets from flying off into space . The force in this case is called centri- petal , because it tends to draw the body towards the centre round ...
Σελίδα 148
... miles per hr . 10. A body moves 100 yds . in 5 sec . What is its velocity per hr . ? Ans . 40 miles 1600 yds . 11. A steamer moves 20 miles per hr . through the water . The tide against her is 5 miles per hour , and a passenger is ...
... miles per hr . 10. A body moves 100 yds . in 5 sec . What is its velocity per hr . ? Ans . 40 miles 1600 yds . 11. A steamer moves 20 miles per hr . through the water . The tide against her is 5 miles per hour , and a passenger is ...
Σελίδα 150
... miles per hour , comes into collision with another weighing 130 tons , moving at a speed of 880 yards in 2 ' 30 " . What effect will the first train have in stopping the second ? 38. A point in equilibrium has three forces acting upon ...
... miles per hour , comes into collision with another weighing 130 tons , moving at a speed of 880 yards in 2 ' 30 " . What effect will the first train have in stopping the second ? 38. A point in equilibrium has three forces acting upon ...
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 applied attached axis axle balance base block body called cause centre CHAPTER circle circular circumference continuous curve cylinder descend described diameter direction distance dividing double draw drawn earth effect efficiency equal equilibrium evident example exerted fall feet fixed foot force of gravity forces acting friction given greater half Hence horizontal impart inches inclined plane increases length lever lifted machine means mechanical miles motion movable move multiplied opposite parallel particle passing path pendulum perpendicular pitch placed position pounds pressure produce proportional pulley radius raise ratio remain represented resistance rest resultant rope round screw sheaves side single space square stone straight line supported suppose surface teeth third tion triangle turned uniform unit velocity vertical wedge weight wheel
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...