Question

Problem 2 Find the location of the points on the x and y axes about which the 300 N force will produce a zero moment at the point o, in the diagram shown below. Hint: x < 100 mm and y> 20 mm 20 mm 246 N 100 mm ------- - Y172 N 300 N

Answer 1

Solution: Goo-2) ata ex 20mm 246N t 10omon 1 350 BOON 172N Taking Moment about b; considering 26 + 122 x(100-x1) - (246X 20) = 0 og 17200 – 4920 - 192x, on, 2,2 12 280 172 or x= 71.395 or x = Z1 mm Now taking Moment about a; Considering 36 -246*(6, +20) + (172x100) =0 on, 24660,= 17200 --4920 og D = 12280 246 os1, ,- 49.918.09, ,50 mm.

is Basically if a point placed on the line of action of a force then producing moment will be zero about that point. To check our conlculations we will use the triangle rule here. Too 2 = 50mm should be equal to 3, +20 = 0.7049 0.7 on x=71 mm 20 mm 100mm system; 2(e) Dit zo 50+20 - 100 - 100 Therefore our calculations are okay. Now respect to the corondinate The location of point b is (-2,0) and point cis co, 50) about this points BooN 2 Jorce will produce a zero moment at point O. 07 50 mm x (6) A 71mm T- (Answer)