# Civil Engineering - UPSC Civil Service Exam Questions - Discussion

3.

A horizontal rod AB carries three loads of 3.0 kg, 7.0 kg and 10.0 kg at distances of 2.0 cm, 9.0 cm and 15 cm respectively from A where it is hinged. Neglecting the weight of the rod, which is the point at which the rod will be balance ?

 [A]. 10.95 cm form A [B]. 11.25 cm from A [C]. 12.55 cm from A [D]. 13.25 cm form A

Answer: Option A

Explanation:

No answer description available for this question.

 Varadharajan said: (Dec 2, 2013) Moment about A = (10X15+7X9+3X2) = 219. Total Load = 10+7+3 = 20. Eccentricity = 219/20 = 10.95 cm.

 Prithviraj Suman said: (Jan 18, 2014) cg of a rod = moment from given point/weight of the rod. cg = (3*2+7*9+10*15)/(10+7+3) = 10.95.

 Prashant Deokar said: (Apr 22, 2014) The point of zero moment is in between 7 & 10kg loads . Assuming plane xx at that portion from B. Moment @xx+0. .: 10x = 7(6-X)+3(13-X). .: X = 10.95CM.

 Muniwar Singh said: (Jan 25, 2015) Where bending moment is zero; if it is at the x-distance from 10 kg. Then. 3(13-x)+7(6-x) = 10 x. Then x = 10.95 cm.

 Sumit Pal said: (Mar 15, 2015) Balance point = Moment from a given point/Total load acting on road. Balance point = (3*2)+(7*9)+(10*15)/(3+7+10). = 10.95.

 Ateeq said: (Nov 5, 2015) Eccentric = Total moment at A/Total loads = 3*2+7*9+10*15 = 219/20 = 10.95 cm.

 Abdul Khan said: (Jan 1, 2016) No one has considered the moment of A reaction, please elaborate I didn't understood.

 Rahul Jain said: (Jun 2, 2016) @Abdul Khan. Point A is hinged that's why the moment about A is zero.

 N.Srinivasan said: (Jun 9, 2016) They have found the Resultant force acting distance from A. So, the rod will balance where resultant force acting only that point.

 Balaraju Dasarla said: (Dec 27, 2016) Balanced distance = summation of moments/summation of loads. d = 219/20, = 10.95.

 Kannan G said: (Mar 20, 2017) The answer is 10.95 cm from A. Explanation : The ratio of the moment about A to the total load. Answer : 10.95cm.

 Anbarasan Muthaiah Ap/Civil Star Lion Engineering said: (Jun 1, 2017) RESULTANT* FORCE DISTANCE OF RESULTANT ACT FROM SUPPORT = SUM OF MOMENT R * x = M. R = 3+7+10 = 20 KG. SUM OF M ABOUT B = (3*2)+(7*9)+(10*15) =219 KG.cm. 219= 20x, x = 219/20 = 10.95cm.

 Abdelhamid said: (Jul 31, 2017) That's not complex+> explanation/blanced point which the point have equlibrim eq sum of force equla 0 force * (x-dis) = zero.

 Ashok said: (Feb 17, 2018) At hinge point moment is zero. What is the reaction on that point?

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