Engineering Mechanics – Statics by Meriam and Kraige

550 Pages · 2011 · 30.85 MB · English

  • Engineering Mechanics – Statics by Meriam and Kraige

    Conversion Factors

    U.S. Customary Units to SI Units

    To convert from To Multiply by


    foot/second2(ft/sec2) meter/second2(m/s2) 3.048 (cid:2)10(cid:3)1*

    inch/second2(in./sec2) meter/second2(m/s2) 2.54 (cid:2)10(cid:3)2*


    foot2(ft2) meter2(m2) 9.2903 (cid:2)10(cid:3)2

    inch2(in.2) meter2(m2) 6.4516 (cid:2)10(cid:3)4*


    pound mass/inch3(lbm/in.3) kilogram/meter3(kg/m3) 2.7680 (cid:2)104

    pound mass/foot3(lbm/ft3) kilogram/meter3(kg/m3) 1.6018 (cid:2)10


    kip (1000 lb) newton (N) 4.4482 (cid:2)103

    pound force (lb) newton (N) 4.4482


    foot (ft) meter (m) 3.048 (cid:2)10(cid:3)1*

    inch (in.) meter (m) 2.54 (cid:2)10(cid:3)2*

    mile (mi), (U.S. statute) meter (m) 1.6093 (cid:2)103

    mile (mi), (international nautical) meter (m) 1.852 (cid:2)103*


    pound mass (lbm) kilogram (kg) 4.5359 (cid:2)10(cid:3)1

    slug (lb-sec2/ft) kilogram (kg) 1.4594 (cid:2)10

    ton (2000 lbm) kilogram (kg) 9.0718 (cid:2)102

    (Moment of force)

    pound-foot (lb-ft) newton-meter (N (cid:3)m) 1.3558

    pound-inch (lb-in.) newton-meter (N (cid:3)m) 0.1129 8

    (Moment of inertia, area)

    inch4 meter4(m4) 41.623 (cid:2)10(cid:3)8

    (Moment of inertia, mass)

    pound-foot-second2(lb-ft-sec2) kilogram-meter2(kg(cid:3)m2) 1.3558

    (Momentum, linear)

    pound-second (lb-sec) kilogram-meter/second (kg (cid:3)m/s) 4.4482

    (Momentum, angular)

    pound-foot-second (lb-ft-sec) newton-meter-second (kg (cid:3)m2/s) 1.3558


    foot-pound/minute (ft-lb/min) watt (W) 2.2597 (cid:2)10(cid:3)2

    horsepower (550 ft-lb/sec) watt (W) 7.4570 (cid:2)102

    (Pressure, stress)

    atmosphere (std)(14.7 lb/in.2) newton/meter2(N/m2or Pa) 1.0133 (cid:2)105

    pound/foot2(lb/ft2) newton/meter2(N/m2or Pa) 4.7880 (cid:2)10

    pound/inch2(lb/in.2or psi) newton/meter2(N/m2or Pa) 6.8948 (cid:2)103

    (Spring constant)

    pound/inch (lb/in.) newton/meter (N/m) 1.7513 (cid:2)102


    foot/second (ft/sec) meter/second (m/s) 3.048 (cid:2)10(cid:3)1*

    knot (nautical mi/hr) meter/second (m/s) 5.1444 (cid:2)10(cid:3)1

    mile/hour (mi/hr) meter/second (m/s) 4.4704 (cid:2)10(cid:3)1*

    mile/hour (mi/hr) kilometer/hour (km/h) 1.6093


    foot3(ft3) meter3(m3) 2.8317 (cid:2)10(cid:3)2

    inch3(in.3) meter3(m3) 1.6387 (cid:2)10(cid:3)5

    (Work, Energy)

    British thermal unit (BTU) joule (J) 1.0551 (cid:2)103

    foot-pound force (ft-lb) joule (J) 1.3558

    kilowatt-hour (kw-h) joule (J) 3.60 (cid:2)106*

    *Exact value SI Units Used in Mechanics

    Quantity Unit SI Symbol

    (Base Units)

    Length meter* m

    Mass kilogram kg

    Time second s

    (Derived Units)

    Acceleration, linear meter/second2 m/s2

    Acceleration, angular radian/second2 rad/s2

    Area meter2 m2

    Density kilogram/meter3 kg/m3

    Force newton N ((cid:4)kg(cid:3)m/s2)

    Frequency hertz Hz ((cid:4)1/s)

    Impulse, linear newton-second N (cid:3)s

    Impulse, angular newton-meter-second N (cid:3)m(cid:3)s

    Moment of force newton-meter N (cid:3)m

    Moment of inertia, area meter4 m4

    Moment of inertia, mass kilogram-meter2 kg(cid:3)m2

    Momentum, linear kilogram-meter/second kg (cid:3)m/s ((cid:4)N(cid:3)s)

    Momentum, angular kilogram-meter2/second kg (cid:3)m2/s ((cid:4)N(cid:3)m(cid:3)s)

    Power watt W ((cid:4)J/s(cid:4)N(cid:3)m/s)

    Pressure, stress pascal Pa ((cid:4)N/m2)

    Product of inertia, area meter4 m4

    Product of inertia, mass kilogram-meter2 kg(cid:3)m2

    Spring constant newton/meter N/m

    Velocity, linear meter/second m/s

    Velocity, angular radian/second rad/s

    Volume meter3 m3

    Work, energy joule J ((cid:4)N(cid:3)m)

    (Supplementary and Other Acceptable Units)

    Distance (navigation) nautical mile ((cid:4)1,852 km)

    Mass ton (metric) t ((cid:4)1000 kg)

    Plane angle degrees (decimal) (cid:4)

    Plane angle radian —

    Speed knot (1.852 km/h)

    Time day d

    Time hour h

    Time minute min

    *Also spelled metre.

    Selected Rules for Writing Metric Quantities

    1. (a) Use prefixes to keep numerical values generally between 0.1 and 1000.

    SI Unit Prefixes

    (b) Use of the prefixes hecto, deka, deci, and centi should generally be avoided

    Multiplication Factor Prefix Symbol except for certain areas or volumes where the numbers would be awkward

    1 000 000 000 000 (cid:4)1012 tera T otherwise.

    1 000 000 000 (cid:4)109 giga G

    (c) Use prefixes only in the numerator of unit combinations. The one exception

    1 000 000 (cid:4)106 mega M

    1 000 (cid:4)103 kilo k is the base unit kilogram. (Example:write kN/m not N/mm; J/kg not mJ/g)

    100(cid:4)102 hecto h (d) Avoid double prefixes. (Example:write GN not kMN)

    10(cid:4)10 deka da 2. Unit designations

    0.1(cid:4)10(cid:3)1 deci d (a) Use a dot for multiplication of units. (Example:write N (cid:3)m not Nm)

    0.01(cid:4)10(cid:3)2 centi c

    0.001(cid:4)10(cid:3)3 milli m (b) Avoid ambiguous double solidus. (Example:write N/m2not N/m/m)

    0.000 001 (cid:4)10(cid:3)6 micro (cid:2) (c) Exponents refer to entire unit. (Example:mm2means (mm)2)

    0.000 000 001 (cid:4)10(cid:3)9 nano n 3. Number grouping

    0.000 000 000 001 (cid:4)10(cid:3)12 pico p Use a space rather than a comma to separate numbers in groups of three,

    counting from the decimal point in both directions. Example:4 607 321.048 72)

    Space may be omitted for numbers of four digits. (Example:4296 or 0.0476) This page intentionally left blank E n g i n e e r i n g M e c h a n i c s

    V o l u m e 1


    Seventh Edition This page intentionally left blank E n g i n e e r i n g M e c h a n i c s

    V o l u m e 1


    Seventh Edition

    J. L. Meriam

    L. G. Kraige

    Virginia Polytechnic Institute and State University

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    Library of Congress Cataloging-in-Publication Data

    Meriam, J. L. (James L.)

    Engineering mechanics / J.L. Meriam, L.G. Kraige.—7th ed.

    p. cm.

    Includes index.

    ISBN: 978-0-470-61473-0

    ISBN: 978-0-470-91787-9 (BRV)

    1. Mechanics, Applied. I. Kraige, L.G. (L. Glenn) II. Title.

    TA350.M458 2006

    620.1—dc 2006003346

    Printed in the United States of America

    10 9 8 7 6 5 4 3 2 1

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