Elementary Introduction to Practical Mechanics: Illustrated by Numerous ExamplesLongmans, 1870 - 324 страници |
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Страница 7
... contraction of the bar . The length of A B is 10 ft . and the distance △ C is 1.725 in . Ans . CE = 4.426 in . C D Ex . 38. - If the expansion in length of EXPANSION PRODUCED BY HEAT . Table of Specific Gravity Expansion produced by Heat.
... contraction of the bar . The length of A B is 10 ft . and the distance △ C is 1.725 in . Ans . CE = 4.426 in . C D Ex . 38. - If the expansion in length of EXPANSION PRODUCED BY HEAT . Table of Specific Gravity Expansion produced by Heat.
Страница 30
... distance in feet . The reader must not mistake this for the units of work done by the agent , the agent being employed not in rais- ing the weight , but in overcoming the passive resistances , friction , & c . , which depend on the ...
... distance in feet . The reader must not mistake this for the units of work done by the agent , the agent being employed not in rais- ing the weight , but in overcoming the passive resistances , friction , & c . , which depend on the ...
Страница 31
... distance would 30 men raise the anchor in Ex . 117 in each minute ? Ans . 42 ft . nearly . Ex . 120. - There is a well 150 ft . deep , a labourer raises water from it by a rope and pulley , how many cubic feet of water will he raise in ...
... distance would 30 men raise the anchor in Ex . 117 in each minute ? Ans . 42 ft . nearly . Ex . 120. - There is a well 150 ft . deep , a labourer raises water from it by a rope and pulley , how many cubic feet of water will he raise in ...
Страница 52
... distance from A of the point round which these forces balance , and the pressure on that point . Ans . ( 1 ) 2 ft . ( 2 ) 20 lbs . Ex . 169. - Let AB be a rod 12 ft . long ( whose weight is neglected ) , from △ a weight of 20 lbs . is ...
... distance from A of the point round which these forces balance , and the pressure on that point . Ans . ( 1 ) 2 ft . ( 2 ) 20 lbs . Ex . 169. - Let AB be a rod 12 ft . long ( whose weight is neglected ) , from △ a weight of 20 lbs . is ...
Страница 53
... slung on a pole , the ends of which rest on their shoulders ; the distance of the weight from A is 6 ft . , and from в is 4 ft . Find the pressure sustained by each man . If P is the pressure sustained by a and q PARALLEL FORCES . 53.
... slung on a pole , the ends of which rest on their shoulders ; the distance of the weight from A is 6 ft . , and from в is 4 ft . Find the pressure sustained by each man . If P is the pressure sustained by a and q PARALLEL FORCES . 53.
Често срещани думи и фрази
accelerative effect angle of resistance angular angular velocity axis axle beam body brickwork cast iron centre of gravity circle circumference coefficient of friction Crown 8vo cubic foot curve cylinder described determine the number diameter direction distance draw Edition engine epicycloid equal equation equilibrium expended extrados forces acting formula given hence horizontal horse-power inclined inclined plane last Example length limiting angle line of resistance mass middle point minute moment of inertia motion moving number of feet number of units oscillation P₁ parallel forces perpendicular plane pressure principle of moments Prop pulley radius raised reaction represent respectively rest resultant right angles rope round screw sliding space square inch steam suppose surface teeth thick thread tion triangle vertical virtual velocities vols wall weight wheel Woodcuts wrought iron
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