Shop Mathematics ...: Prepared in the Extension Division of the University of Wisconsin, Τόμος 1McGraw-Hill book Company, Incorporated, 1924 |
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Σελίδα 141
... lifting the weight W at the other end . If F is close to W , a comparatively small force P may be able to raise the ... lifted depends upon two things - its weight and its distance from the fulcrum F. The product of these two is the ...
... lifting the weight W at the other end . If F is close to W , a comparatively small force P may be able to raise the ... lifted depends upon two things - its weight and its distance from the fulcrum F. The product of these two is the ...
Σελίδα 144
... lifted by pushing down at P. In the second class , Fig . 46 , the weight is between the fulcrum and the force , and the weight is lifted by pulling up at P. In the third class , Fig . 47 , the force P is between the weight and the ...
... lifted by pushing down at P. In the second class , Fig . 46 , the weight is between the fulcrum and the force , and the weight is lifted by pulling up at P. In the third class , Fig . 47 , the force P is between the weight and the ...
Σελίδα 146
... lifted , or the weight divided by the M.A. gives the force required . From a previous paragraph , we found that the ratio of the weight to the force equals the ratio of the force arm to the weight W a W Since the M.A. equals it must ...
... lifted , or the weight divided by the M.A. gives the force required . From a previous paragraph , we found that the ratio of the weight to the force equals the ratio of the force arm to the weight W a W Since the M.A. equals it must ...
Σελίδα 151
... lifted by a force of 200 lb. ? 152. Figure 55 shows a safety valve V loaded with a 50 - lb . weight at W. Find the total steam pressure on the bottom of V necessary to lift the valve . 12- FIG . 53. Illustration for Problem 150 . 12 ...
... lifted by a force of 200 lb. ? 152. Figure 55 shows a safety valve V loaded with a 50 - lb . weight at W. Find the total steam pressure on the bottom of V necessary to lift the valve . 12- FIG . 53. Illustration for Problem 150 . 12 ...
Σελίδα 156
... their M.A.'s can be worked out for all cases . Proceeding as before , let us imagine that W and the movable block of Fig . 62 are lifted 1 ft . The four ropes supporting W must each be shortened 1 ft 156 SHOP ARITHMETIC.
... their M.A.'s can be worked out for all cases . Proceeding as before , let us imagine that W and the movable block of Fig . 62 are lifted 1 ft . The four ropes supporting W must each be shortened 1 ft 156 SHOP ARITHMETIC.
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Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
amount Answer Antilog belt block boiler bolt brake horsepower calculated castings Centigrade cents ciphers circle circumference common denominator common fraction cube root cubic cutting speed cylinder decimal places decimal point diameter dimensions dimes distance divide dividend division dollar efficiency emery wheel equal Example Explanation Fahrenheit feet final divisor foot-pounds force arm formula given gives heat hoist horsepower improper fraction inclined plane indicated jackscrew lathe lead screw length lever lifted line shaft load logarithmic scale machine mantissa measure mechanical advantage minute mixed numbers multiply number of teeth operation piece piston pound pressure PROBLEMS pulley pump quotient raised reduced revolutions per minute rope shaft shown in Fig slide rule square inch square root steam engine steel stress stroke subtract surface speed temperature threads per inch trial divisor unit volume weight arm whole number width
Δημοφιλή αποσπάσματα
Σελίδα 129 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq. yd.) 30j square yards = 1 square rod (sq.
Σελίδα 8 - TIME 60 seconds (sec.) = 1 minute (min.) 60 minutes =1 hour (hr.) 24...
Σελίδα 163 - Fig. 49. We will solve this problem partly graphically and partly by calculation. The first step is to find how fast the crank pin D is moving. For one turn of the crank, D travels through a distance equal to the circumference of a circle whose radius is R, that is, a distance of 2'ffTi.
Σελίδα 3 - An Improper Fraction is one whose numerator is equal to, or greater than, the denominator; as, f, f.
Σελίδα 41 - To divide by 10, move the decimal point one place to the left. To divide by 100, move the decimal. point two places to the left, and so on for other powers of 10.
Σελίδα 5 - When the numerator is less than the denominator, the value of the fraction is less than 1. 5th. When the numerator is equal to the denominator, the value of the fraction is equal to 1. 6th. When the numerator is greater than the denominator, the value of the fraction is greater than 1.
Σελίδα 76 - In any proportion, the product of the means is equal to the product of the extremes.
Σελίδα 41 - To multiply by 10, move the decimal point one place to the right, annexing a zero if necessary.
Σελίδα 2 - Definition of a Fraction. — A Fraction is one or more of the equal parts into which anything may be divided.