# physics

A 3.0 m tall, 42 cm diameter concrete column supports a 230,000 kg load. By how much is the column compressed? Assume Young's modulus for concrete to be 3.0 1010 N/m2.

in mm

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1. strain = delta L /L = sigma/modulus

sigma = Force/area
= 2.3*10^5/(pi * .24^2)

delta L = 3 * 2.3*10^5 / (pi * .24^2 *3*10^10) in meters

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posted by Damon
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