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HW3_sol

# HW3_sol - 4.16 A tnrss may be supportedin three different...

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l l l l l l l l l l l l l l l l l r r r 4.16 A tnrss may be supported in three different ways as shown. In each one, determine the reactions at the supports. v L E ( o *; e T rpf s I Itt r t t ca,\ +) ZM & =o: B(z*) - (zrwls,.)-fr N)(tsil=o B = * *,s krV SZE=o: Ain*2knt+tkil= 0 T I' Sm + lgh A^= -4 kN 4,,, -3 krr/f k.s kd = tJ 3 kl'/ A = 4,LT kN Ff,O,6o j At = l,f kt't 8 = +,EaKfll + flE A'tA =oi Fr( z^) -(zru)(t^)-(zftrufl,sn^J= o B! = + t' s /< N L > f =o t Bn*Zt M+ Lktt/ = o A = l: 50 kM t ; I : 6,01-kMS't},tt\ [c) +)THn -o: (B ^*loJ(r^) - (z k^l)P*)- (z tu)(lr,')= d Ea\$l'= 1.9 kN/ B:5, 20ktJ J='z n'o i E fr*+LhMtZ kd - (nzo&rY)s;nloo= o ftn=-l,LlO t<n/' +t ZFr=oi zkN r /'5m {- 6 +fz A A B -,L v2n 2rrt +?>f= o: #, -3knl+ tr, fkil = o t A, I ,sdKnl r! = -h ' A=2,0t kt/ F 47,A0 ; B: Euokd-L 6o,0? b z^ Jts' 3 kr/ I liir !, trj\ -"1- :i [:N

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Problem 4.47 4,47 A l2-ft ladder, weighing 40 lb, leans against a frictionless verticalwall. The lower endof the ladder rests on rough ground, 4 ft awayfrom the wall. Determine the reactions at both ends. - - l t l d, = t0,01 40 lb 9;nce ttre laddcr;s q- I 3 - fdce M,1 , E rnvst pnss -l'AroogA D whe rc n ev{ I he.
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