CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Steel wire of length L at 40C is suspended from the ceiling and then a mass m is hung from its free end. The wire is cooled down from 40C to 30C to regain its original length L. The coefficient of linear thermal expansion of the steel is 105/C. Young's modulus of steel is 1011N/m2 and radius of the wire 1 mm. Assume that L>> diameter of the wire. Then the value of m in kg is nearly.

Open in App
Solution

Y=stressstrain=mg/ΔΔl/l

Y=mglAΔl

Y=mglAlΔT=mgAΔT

m=YAΔTg

=104×π(103)2×103×1010

n3

m=3

flag
Suggest Corrections
thumbs-up
0
similar_icon
Similar questions
View More
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Thermal Expansion
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon