a motorcycle begins at rest and accelerates uniformly at 7.9 m/s2. We want to find the time it takes the motorcycle to reach a s
2 answers:
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Explanation:
As the given rod is attached to rigid supports as a result, the deformation occurring due to the change in temperature will cause stress in the rod.
Let us assume that P is the compressive force in the rod due to change in temperature.
So,
=
=
Now, we will calculate the actual change in temperature as follows.
This means that the actual change in temperature is more than required for yielding.
(a) Formula to calculate yielding stress is as follows.
=
=
=
Hence, stress in the bar when temperature is raised to is
.
(b) Now, we will calculate the residual stress as follows.
= 15.837 ksi
Therefore, stress in the bar when the temperature has returned to is 15.837 ksi.