Civil Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 3 (Q.No. 9)
9.
A steel rod of 2 cm diameter and 5 metres long is subjected to an axial pull of 3000 kg. If E = 2.1 x 106, the elongation of the rod will be
Discussion:
38 comments Page 2 of 4.
Vikas said:
8 years ago
I agree @Situ Gupta.
Bikash kabiraj said:
8 years ago
The Correct answer is B. I agree.
Deb said:
8 years ago
@Situ Gupta.
Yes, the answer is right, everything should be in mm 0.0227.
Yes, the answer is right, everything should be in mm 0.0227.
Saurabh yadav said:
8 years ago
No answer B is correct because E will in kg/cm2 so every dimension will be in cm.
Murali said:
8 years ago
Option A is correct.
Dhanu said:
8 years ago
E will in kg/mm2 then only answer will be correct.
Amer said:
8 years ago
Can someone calculate the area in simple term?
Paul said:
8 years ago
Yes, it is 2.27 mm.
Anjan paul said:
8 years ago
dia=2cm, A=3.1416cm^2,
P=3000kg, L=5m=500cm, (E=2.1*10^6 Kg/cm^2)
Now, (PL/AE)={(3000*500)/(3.1416*2.1*10^6)} {(kg*cm)/(cm^2*(kg/cm^2))}
PL/AE= {(15*10^5)/(3.1416*21*10^5)} (cm)
PL/AE=0.22736cm =2.274~ 2.275mm.
So, answer is 2.275mm.
P=3000kg, L=5m=500cm, (E=2.1*10^6 Kg/cm^2)
Now, (PL/AE)={(3000*500)/(3.1416*2.1*10^6)} {(kg*cm)/(cm^2*(kg/cm^2))}
PL/AE= {(15*10^5)/(3.1416*21*10^5)} (cm)
PL/AE=0.22736cm =2.274~ 2.275mm.
So, answer is 2.275mm.
Sudip Byapari said:
8 years ago
2. 274 is the correct answer.
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