Shop Mathematics, Τόμος 1McGraw-Hill, 1931 |
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Σελίδα 154
... force P has a moment , which is the product of the force P and the distance from P to the fulcrum F. If the force and the weight just balance each other , their moments are equal . The length from P to F is called the force arm and the ...
... force P has a moment , which is the product of the force P and the distance from P to the fulcrum F. If the force and the weight just balance each other , their moments are equal . The length from P to F is called the force arm and the ...
Σελίδα 158
... force has an arm equal to the whole length of the lever , or 10 ft . The necessary force on the end of this lever we find to be 1600 lb. The second lever must pull upward through the connection with a force of 1600 lb. In other words ...
... force has an arm equal to the whole length of the lever , or 10 ft . The necessary force on the end of this lever we find to be 1600 lb. The second lever must pull upward through the connection with a force of 1600 lb. In other words ...
Σελίδα 172
... force arm on a lever . It permits the force doing the work to use a greater distance , and hence the force will be smaller than the weight raised . Neglecting friction or , in other words , supposing bodies to be perfectly smooth and ...
... force arm on a lever . It permits the force doing the work to use a greater distance , and hence the force will be smaller than the weight raised . Neglecting friction or , in other words , supposing bodies to be perfectly smooth and ...
Περιεχόμενα
ARTICLE | 1 |
Improper fractions | 7 |
Reduction to lower terms | 13 |
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amount Answer Antilog belt block boiler bolt brake horsepower Calculate castings cent Centigrade centimeters ciphers circle circumference common fraction cutting speed cylinder decimal places decimal point denominator diameter dimes distance divide dividend division dollar efficiency emery wheel equal Example Explanation Fahrenheit feet figure foot force arm formula given heat hoist horsepower improper fraction inclined plane indicated jackscrew lathe lead screw length lever lifted line shaft load logarithmic scale logarithms machine mantissa measure mechanical advantage meter minute mixed number multiply number of teeth pipe piston pounds pressure Problem pull pulley pump quotient raised ratio reduced revolutions per minute rope scale shown in Fig slide rule square inch square root steam engine steel stress stroke subtract surface speed tank temperature threads per inch trial divisor unit volume weight arm whole number width