Solucionario Hibberler

Instructor's Solutions Manual

ENGINEERING MECHANICS

STATICS
TENTH EDITION

R. C. Hibbeler

Pearson Education, Inc. Upper Saddle River, New Jersey 07458

Executive Editor: Eric Svendsen Associte Editor: Dee Bernhard Executive Managing Editor: Vince O'Brien Managing Editor: David A. George Production Editor: Barbara A. Till Director of Creative Services: Paul Belfanti ManufacturingManager: Trudy Pisciotti Manufacturing Buyer: Ilene Kahn

About the cover: The forces within the members of this truss bridge must be determined if they are to be properly designed. Cover Image: R.C. Hibbeler.

© 2004 by Pearson Education, Inc.
Pearson Prentice Hall Pearson Education, Inc. Upper Saddle River, NJ 07458

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ISBN 0-13-141212-4
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Contents
1 2 3 4 5 6 7 8 9 10
11 GeneralPrinciples Force Vectors Equilibrium of a Particle Force System Resultants Equilibrium of a Rigid Body Structural Analysis Internal Forces Friction Center of Gravity and Centroid Moments of Inertia Virtual Work

1 5 77 129 206 261 391 476 556 619 680

1.1. Round off the following numbers to three significant figure~: (a) 4.65735 m, (b) 55.578 S, (c) 4555 N, (d) 2768 kg.

a) 4.66 m

b) '5.6 sc) 4.56 kN

d) 2.77

Ma

......

I----------------..-.------..---.--------------~--------II
1.2. Wood has a density of 470 sIugjft3 . . density expressed in SI units?' . What IS Its
(1it')(14.5938 kg) } 242 Mslm' (4.70a1ug/tt') { (0.3048 m)3(1 slug) = .
Aas

1-----------------------_.__. . . .__------_.----------. .
1·3. Represent each of the following quantities in the correct SIform using an appropriate prefix: (a) 0.000431 kg. (b) 35.3(10~) N, (c) 0.00532 km.
a) 0.00043lkg=0.000431(IOl ) 11=0.431 1

Ans ......

b) 3S.3( 10l) N = 35.3 kN

c) 0.00532 Ian
---.~----------

=0.OOS32( lal)

m = 5.32 m

"'Id
...-.Ans
Ans

..--.... - - - - :...... .. ""

-----.. -......- ..--.- .....---.--.-.-.....

---------~------

(a) mlms = - - ~ -S- - laD/s (10)-' S( m ) (10>' m)

.1.... in the correct SI form using an appropriate prefix: each of the following combinations of uniiS
Rep~~sent

(aJ mlms, (b) JLkm, (c) kslmg. and (d) km· JLN.

(10)' (c) ts/1111 = ( ~ ..

S) ((10)9 S) kg

Os/kg

Ans

Ans

------------------------------------------------.----t
1.5. If a car is traveling at 55 mi/h, determine its speed in.kilometers per hourand meters per second.
SS mi/h .. (~)(S280ft)(~)(~) Ih I IDI I ft 1000 m '" 88.S km/h Ans
88.Skm)(IOOOm)( Ih 88.5 km/h =( - - - - __ ) - 246 mls Ih Ikm 3600s - .

1-----------_._----_._------------------_._-(c) (230m)3,
1-6. EvaIuateeach of the follOwing and express with an appropriate prefix: (a) (430 kg)2 (b) (0.002 mg)2 and
(a) (b)
(c)

(430 kg)'

= 0.185(10') kg' = O.ISS Mi =...