Engineering Mechanics: Statics (SI Edition), Third Edition (Volume 1)

603 Pages·2010·44.79 MB·English

by  Andrew Pytel

CONVERSIONS BETWEEN U.S.CUSTOMARY UNITS AND SI UNITS (Continued)
Times conversion factor
U.S. Customary unit Equals SI unit
Accurate Practical
Moment of inertia (area)
inch to fourth power in.4 416,231 416,000 millimeter to fourth
power mm4
inch to fourth power in.4 0.416231 10 6 0.416 10 6 meter to fourth power m4
Moment of inertia (mass)
slug foot squared slug-ft2 1.35582 1.36 kilogram meter squared kg·m2
Power
foot-pound per second ft-lb/s 1.35582 1.36 watt (J/s or N·m/s) W
foot-pound per minute ft-lb/min 0.0225970 0.0226 watt W
horsepower (550 ft-lb/s) hp 745.701 746 watt W
Pressure; stress
pound per square foot psf 47.8803 47.9 pascal (N/m2) Pa
pound per square inch psi 6894.76 6890 pascal Pa
kip per square foot ksf 47.8803 47.9 kilopascal kPa
kip per square inch ksi 6.89476 6.89 megapascal MPa
Section modulus
inch to third power in.3 16,387.1 16,400 millimeter to third power mm3
inch to third power in.3 16.3871 10 6 16.4 10 6 meter to third power m3
Velocity (linear)
foot per second ft/s 0.3048* 0.305 meter per second m/s
inch per second in./s 0.0254* 0.0254 meter per second m/s
mile per hour mph 0.44704* 0.447 meter per second m/s
mile per hour mph 1.609344* 1.61 kilometer per hour km/h
Volume
cubic foot ft3 0.0283168 0.0283 cubic meter m3
cubic inch in.3 16.3871 10 6 16.4 10 6 cubic meter m3
cubic inch in.3 16.3871 16.4 cubic centimeter (cc) cm3
gallon (231 in.3) gal. 3.78541 3.79 liter L
gallon (231 in.3) gal. 0.00378541 0.00379 cubic meter m3
*An asterisk denotes an exactconversion factor
Note:To convert from SI units to USCS units, divideby the conversion factor
5
Temperature Conversion Formulas T(°C) [T(°F) 32] T(K) 273.15
9
5
T(K) [T(°F) 32] 273.15 T(°C) 273.15
9
9 9
T(°F) T(°C) 32 T(K) 459.67
5 5
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Engineering Mechanics
Statics
Third Edition, SI
Andrew Pytel
The Pennsylvania State University
Jaan Kiusalaas
The Pennsylvania State University
SI Edition prepared by
Ishan Sharma
Indian Institute of Technology Kanpur
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Contents
PrefacetotheSIEdition x
Preface xi
Chapter1 IntroductiontoStatics 1
1.1 Introduction 1
1.2 NewtonianMechanics 3
1.3 FundamentalPropertiesofVectors 10
1.4 Representation of Vectors Using Rectangular
Components 18
1.5 VectorMultiplication 27
Chapter2 BasicOperationswithForceSystems 37
2.1 Introduction 37
2.2 EquivalenceofVectors 37
2.3 Force 38
2.4 ReductionofConcurrentForceSystems 39
2.5 MomentofaForceaboutaPoint 49
2.6 MomentofaForceaboutanAxis 60
2.7 Couples 73
2.8 ChangingtheLineofActionofaForce 86
Chapter3 ResultantsofForceSystems 97
3.1 Introduction 97
3.2 ReductionofaForceSystemtoaForceandaCouple 97
3.3 DefinitionofResultant 105
3.4 ResultantsofCoplanarForceSystems 106
3.5 ResultantsofThree-DimensionalSystems 116
3.6 IntroductiontoDistributedNormalLoads 128
Chapter4 CoplanarEquilibriumAnalysis 143
4.1 Introduction 143
4.2 DefinitionofEquilibrium 144
PartA:AnalysisofSingleBodies 144
4.3 Free-BodyDiagramofaBody 144
4.4 CoplanarEquilibriumEquations 153
vii