Question

A wire of 3 m length and cross-section area 1.0 x 10^-6m² has a mass of 15 kg hung on it. What is the stress produced in the wire? If Young's modulus for material is 2.0 x 10^11 Nm . what is the extension produced? What is energy stored in wire? Also calculate the change in gravitation potential energy of mass after it is hunged.)​

Answer 1

Answer:

Young Modulus of Elasticity

Y=  

Al

FL

​

 

F=  

L

YAl

​

 

F=  

2

2×10  

11

×1×10  

−6

×10  

−3

×10  

−1

 

​

 

F=100N

Work Done =  

2

1

​

×100×1×10  

−3

×10  

−1

 

=0.005J

Work done = 5×10  

−3

joule