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Punkyc7
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Homework Statement
Suppose the ends of a 20-m-long steel beam are rigidly clamped at 0°C to prevent expansion. The rail has a cross-sectional area of 30 cm^2. What force does the beam exert when it is heated to 40°C? ( αsteel = 1.1 × 10−5/C°, Ysteel = 2.0 × 1011 N/m2).
Homework Equations
delta L =alpha Li delta T
The Attempt at a Solution
I solve for the new length and get 20.0088m. I don't know what Ysteel is used for or were to start after finding the new lenght.
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