360 Static Equilibrium and ElasticityP12.24xL=34If the CM of the two bricks does not lie over the edge, thenthe bricks balance.If the lower brick is placed L4over the edge, then thesecond brick may be placed so that its end protrudes 34Lover the edge.LxFIG. P12.24P12.25To find U,measure distances and forces from point A. Then, balancing torques,0 75029 4 2 25...afafU=U=88 2. NTo find D, measure distances and forces from point B. Then, balancing torques,0750150 294.afafafD=D=58 8Also, notice that UDFg=+, so Fy=∑0.*P12.26Consider forces and torques on the beam.Fx∑=0 :RTcoscosθ−°=530Fy∑=0:sinsin+°−=53 8000N
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