Question
Physics Question on mechanical properties of solids
Modulus of elasticity for a perfectly elastic body is
A
Zero
B
infinity
C
1
D
2
Answer
infinity
Explanation
Solution
Young's modulus for a perfectly elastic body is infinity. For an elastic body, there is no deformation on the application of load. Therefore, the strain is equal to zero. The denominator becomes zero which leads to the infinite value of Young's modulus.