Beer, Johnston, Eisenberg Vector Mechanics for Engineers – Statics 8 ed Ch6.9-12_2007

Vector Mechanics for Engineers: Statics w/CD-ROM

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5) tG 1). r^n -+[ J\ € nnp :- h *" -r- hon =(=i.o hr)(o e') - { r Lr,rn oc Faa,sg = 8ootJ &.7 : F si-.D =- lbo U 0 PROBLEM 6.90 The 120N load is removed and a 48-N'm clockrvise coupleis applied zuccessively at A, D, md E. Detennine the-components of the reactions at .B and F when the couple is applied (a) at A, (b) at D, (c) at E. BC ii G ) $-orce fr,e^r-\oZ t t - tool*-- SOOvtrrnn a B = to--' (#) = I l , 3 0 F n . : g l 5 , t l { (c,' a)Fs.(,') * 6'^r Fs.(z) - P r ' r r : O r{ fr.=sl5'3NI t l = g 11 =o F" - t-oou: o -trX l lbo U=O gffiL)-) =* lbO,J .1, 1\ €- Bx ,oof\ il ---:------si-- (rr^.O) {fflB=o {L =$ 3zoLJ;- B^ :o A " - r o v - J r e . v = Q r 'BC)s 3Jo lt-) e. / L O U I
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Ztrb =o PROBLEM 6.96 i{}kipr The cab and motor units of the front-end loader shown ate connected by a z:r'. yslls4l pin located 60 in. behind the cab wheels. The distancefrom Cto D is # 30 in. The center of gravity of the 50-kip motor unit is located at Gru while Ff.!ffi the centers of gravity of the 18-kip cap and 16-kip load are located " V respectively, at G" and G,.Knowing that the machine is at restwith its ffiMSWW il:i'"**'* brakes released, determine (a) the reactions at each of the forn wheels, (a) the reactions at t (b) the forces exerted on the motorunit at C and D- 5o L^.*, I l.* t t v \ I Z Ft* zFs ^) fhn = e (ron-r-Xrs'-) -(''bfXsr)* aB(,,{5i^) -Go f f = f,u,a h^f- | t - (trc fo 14tr" = o |:j:8 h*' I tho - o lCr)Lso,f , ( s z,+ )Gs',^) -6o ur')(.,,o,i= o Cx = 3 *,1 L,-p ? t F r : g bx -3Ll t h.*g- - O I \* =3'l 1 l^^{L^ -; I { r * ,J= o \?
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