5.7 shear and moment diagrams R=24 kips 19595.0690 6 w=2 kips/ft P=13.5 kips 72 moment (kip-ft) (c) RA=19.5 kips Rg=18 kips -12' 44' (d) R=2x (a) w =2 kips/ft 19.5 V=0 (-5.06) (95.06) (-18) shear (kips) -x=9.75' -45 （-72) 2.25 -18 RA 19.5 kips (b) (e) 5.7 example 2 3 k/ft d R2、=10 10 1R、=5 V=∫pdk+C=∫0.3x-3)k+C ,M=vk+G=∫o152-3x+10k+G2 态ne=o-0 1Rgy=10* +10 19.24 V=0.15x2-3r+10 M=0.05r3-1.5r2+10x V(k) 4.23