Suppose a spring is attached on the either sides of the joint then will this model be able to work? Why or why not? Give reasons.
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Answer:
When a force is placed on a material, the material stretches or compresses in response to the force. We are all familiar with materials like rubber which stretch very easily.
In mechanics, the force applied per unit area is what is important, this is called the stress (symbol \sigmaσsigma). The extent of the stretching/compression produced as the material responds to stress is called the strain (symbol \epsilonϵ\epsilon). Strain is measured by the ratio of the difference in length \Delta LΔLdelta, L to original length L_0L
0
L, start subscript, 0, end subscript along the direction of the stress, i.e. \epsilon=\Delta L/L_0ϵ=ΔL/L
0
\epsilon, equals, delta, L, slash, L, start subscript, 0, end subscript.
Every material responds differently to stress and the details of the response are important to engineers who must select materials for their structures and machines that behave predictably under expected stresses.