Patricia Physics Question re: Mmass

Question description

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 =