Question
Physics Question on mechanical properties of solids
A tensile force of 2×105 dynes doubles the length of an elastic cord whose area of cross section is 2scm Young's modulus of the material of the cord is
A
1×105dynes/cm2
B
2×105dynes/cm2
C
0.5×105dynes/cm2
D
4×105dynes/cm2
Answer
1×105dynes/cm2
Explanation
Solution
γ=AeFl