Posted by Antonio on Sunday, April 10, 2011 at 3:49pm.
A 4.8mtall, 30cmdiameter concrete column supports a 5.0×105 kg load. By how much is the column compressed?

Physics  drwls, Sunday, April 10, 2011 at 4:45pm
compression distance = (column length)*strain
Strain = Stress/(Young's modulus)
Stress = (load)/(area) = M*g/[(pi/4)D^2]
Look up Young's modulus for concrete and do the numbers. The modulus might be dfferrnt if the concrete is reinforced with steel, as most is.

Physics  drwls, Sunday, April 10, 2011 at 4:50pm
According to information online, use 26,000*10^6 Pascals for Young's modulus of concrete, whether reinforced or not.
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