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March 30, 2017

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A 4.8-m-tall, 30-cm-diameter concrete column supports a 5.0×105 kg load. By how much is the column compressed?

  • Physics - ,

    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 - ,

    According to information online, use 26,000*10^6 Pascals for Young's modulus of concrete, whether reinforced or not.

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