Question
Physics Question on mechanical properties of solids
A metal wire of natural length 50cm and cross-sectional area 4.0 mm2 is fixed at end. A mass of 2.4kg is hung from the other end of the wire. If the elastic pot energy of the wire is 1.8x10-4J,then its Young's modulus is:(Take g=10 ms-2)
A
1.6x1011 Nm²
B
2.4x1011 Nm²
C
3.2x1011 Nm²
D
1.8x1011 Nm²
E
2.0x1011 Nm²
Answer
2.0x1011 Nm²
Explanation
Solution
The correct answer is (E):2.0x1011 Nm²