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A rod of length 2 m is at a temperature ...

A rod of length 2 m is at a temperature of `20^@` C. find the free expansion of the rod, if the temperature is increased to `50^@`C, then find stress produced when the rod is (i) fully prevented to expand, (ii) permitted to expand by 0.4mm. `Y=2xx10^(11)N//m^(2), alpha=15xx10^(-6//^(@))C`.

A

`6xx10^(7)N//m^(2)`

B

`9xx10^(5)N//m^(2)`

C

`9xx10^(7)N//m^(2)`

D

`6xx10^(5)N//m^(2)`

Text Solution

Verified by Experts

The correct Answer is:
A

Along the incline acceleration of both liquid & trolley is `gsintheta`. (Surface will incline perpendicular to `g_("eff")`)
`implies alpha=theta`
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