Theory of Structures
A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is

W²L/AE
WL/2AE
W²L/2AE
WL/AE

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Theory of Structures
The horizontal thrust on the ends of a two hinged semicircular arch of radius ‘R’ carrying

All of these
A distributed load varying from zero at the left end to ? per unit horizontal run at the right end, is ? ?R/?
A uniformly distributed load ? per unit run over its right half span, is ? ?R/?
A uniformly distributed load ? per unit run over its entire span is 4/3 ?R/?

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