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and welcome back to education
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foundation. So in this class we'll be
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looking at the topic called
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the stiffness of an elastic material.
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So now what is the stiffness of an
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elastic material or the stiffness of a
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material? So take down the stiffness of
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a material is the ability of such
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material to resist deformation
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in response to an applied force.
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The stiffness of a material quantifies
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the relationship between the force
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exerted on the material and the
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resulting deformation.
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From the two statements I have made, we
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can now derive an equation.
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Remember that I said that the stiffness
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of a material quantifies the
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relationship between the force exerted
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on the material and the resulting
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deformation of the material. So that is
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what the expression as this.
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The F symbol here represent the force as
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we all know. The K here represents the
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stiffness of the material and delta L
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here represents the change in length of
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So let's take note of some following
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important points regarding the stiffness
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of an elastic material.
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Note the following point
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down. The net stiffness of individual
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material is usually defined relative to
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whether they are interacting in series
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or parallel. So that's point number one.
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So then our second point is that when
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different materials with individual
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stiffnesses interact in parallel their
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net stiffness is defined using the
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formula. So in other words, their
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negativeness which is represented by Ket
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will then be equals to K1
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K1 to KN represent the individual
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stiffnesses of each material.
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So now let's take note of the third
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Remember this point number two. So then
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point number three states that when
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different materials with individual
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interact in series, their net stiffness
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is defined using the formula
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will then be equals to 1 all over k1
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So here K1, K2, K3 to KN represents the
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individual stiffness of each material.
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So now that I've taken note of the
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following points, in our next video
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we'll be looking at some sample problems
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relating to the stiffness of a material
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or the stiffness of an elastic material.
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So you found this video helpful. Don't
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forget to like and subscribe and drop
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your questions in the comment section
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below. Thanks for watching and see you
