A particular human hair has a Young's modulus of 3.77×109N/m2and a diameter of 146 μm.
If a 256 g object is suspended by the single strand of hair thatis originally 15.5 cmlong, by how much ΔL hair
will the hair stretch?
If the same object were hung from an aluminum wire of the samedimensions as the hair, by how much ΔLAl
would the aluminum stretch?
If the strand of hair is modeled as a spring, what is its springconstant khair?
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