Patricia Physics Question re: Mmass

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A sign (mass 2300kg ) hangs from the end of a vertical steel girder with a cross-sectional area of 0.014m2 . Ignore the mass of the girder itself. The elastic modulus for steel is 2.0×1011N/m2.

Part A What is the stress within the girder? Express your answer to two significant figures and include the appropriate units. stress =
Part B What is the strain on the girder? Express your answer to two significant figures. strain =

Part C If the girder is 6.30m long, how much is it lengthened? Express your answer to two significant figures and include the appropriate units. Δℓ =

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