Question: A slightly tapered bar AB of rectangular cross section and length L is acted upon by a force P (see figure). The width of the

A slightly tapered bar AB of rectangular cross section and length L is acted upon by a force P (see figure). The width of the bar varies uniformly from b2 at end A to b1 at end B. The thickness t is constant.
(a) Determine the strain energy U of the bar.
(b) Determine the elongation Î´ of the bar by equating the strain energy to the work done by the force P.

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