B Find the resultant of 3 concurrent coplanar forces of: i) ii) 60 N acting 20 degrees east of north 30 N east iii) 150 N acting 40 degrees east of south a) 240 N east b) 160 N 68 degrees east of south c) d) e) 60 N 40 degrees east of south 140 N 100 degrees east of south 30 N 73.8 degrees east of north E A Find the magnitude and direction of the resultant of 3 coplanar forces of: 40 N 45 degrees east of south 10 N west i) ii) iii) 70 N 35 degrees east of north a) b) c) d) e) D 65 N 65 degrees east of north 35 N 35 degrees east of south 120 N west 100 N 25 degrees east of south 55 N 45 degrees west of south 15. A steel bar of square cross section is to be designed to carry an impact type load of 79 kN. What should the cross sectional dimensions be if the ultimate strength of the steel is 700 Mpa? A] 29.27mmx 29.27mm BJ 30.0mmx30.0mm c] 32.7mmx32.7mm D] 3.06cmx3.06cm E] 29.27cmx29.27mm