Asked by Sreedhar Rao | 30th Sep, 2014, 10:48: AM

Expert Answer:

(a) The material of the rod is brittle because there is no significant plastic region beyond eleastic limit. For brittle materials, the breaking point lies close to the elastic limit.
(b) In the linear part of the graph a stress of 7.25 × 108 pa corresponds to a strain of 0.01.
Therefore the corresponding Young's modulus of the material corresponding to this graph is:

 
begin mathsize 14px style straight Y space equals space Stress over Strain equals fraction numerator 7.25 cross times 10 to the power of 8 space Pa over denominator 0.01 end fraction straight Y space equals space 7.25 cross times 10 to the power of 10 space Pa end style
 
 Please ask other two questions as seperate separate queries.

Answered by Jyothi Nair | 1st Oct, 2014, 10:16: AM

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