# Replace the two forces and one couple acting on the...

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UCI Engr30/CEE30A4AE30 STATICS t/4 Second Midterm Exam 11:00 AM - 12:20 PM PDT Jily 19,2017 Sr/u*,o, ,,o, Name (Print): 1. Replace the two forces and one couple acting on the rigid pipe frame equivalent resultant force R acting at point O and a couple NI.o. by their (7 points) i,--go(s,htoo, o , -co{?oo ) d =(-tF ,-tO, f-) fr, = ig *i, = (atL,o [ , -lv!.r , vfo ) ,/r1., ,; :O{.rt ,-zf.t', , %,t) 0L'ft lt' I ''t v \) r fz ) fu\- = (0,-60,e ) , d*=Coto,l2 ) ia *i- = (7*, o, d )lb'tn = (do,o,o)lttr+ 4'(L (rY,-6, -tfi') )/\$ 7= (ld,/ ,-6?. I ,N'il-&-ft l|z=(ct,-t{o, o) J R *> /tlt-r J-r e"y - rt tL JJ -- frr+Ar+fil\
UCI Engr30/CEE30/MAE30 STATICS 2t1 2. The lever ABC rs pinned at A and connected to a short link BD pin-ended shown below. A horizontal force of 400N is applied at point C. The weight of members is negligible. (a) Is the short link BD a two-force member? If so, draw the free-body diagram specific to the two-force member BD.lf not, explain the reason (2 (b) Determine the reaction (two components in x- and y-direction1 at the pin-support at D, as the points) A' 17 Points' ,n u v" lLy s @)(ns -,8: | ', '', "'t" u D, ,] .l il, . ' *tl , :, , : f"