olsyboy
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An aerospace engineer has built two differently designed wings. One wing is made from
an aluminium alloy and the other is made from a carbon fibre composite.
The engineer tests a sample of each material by applying a varying stress.
Tick two of the boxes to indicate which are properties of the material
from which the wing is made.

breaking stress
stiffness constant, k
tensile strain
tensile stress
Young modulus

The answer is breaking stress and Young modulus. Why is stiffness constant not a property?
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Eimmanuel
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(Original post by ollyscargill)
An aerospace engineer has built two differently designed wings. One wing is made from
an aluminium alloy and the other is made from a carbon fibre composite.
The engineer tests a sample of each material by applying a varying stress.
Tick two of the boxes to indicate which are properties of the material
from which the wing is made.

breaking stress
stiffness constant, k
tensile strain
tensile stress
Young modulus

The answer is breaking stress and Young modulus. Why is stiffness constant not a property?
Stiffness constant is related to the property of the object instead of the material.
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