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| Q.78 | In the analysis of structures by the principle of Virtual Work, which of the following forces are assumed to do work and are not omitted? | |
| Ans | 1. Reaction at smooth pins and hinges which do not move. | |
| 2. Tension in a light inextensible string. | ||
| 3. Forces normal to the direction of displacement. | ||
| 4. Concentrated load on the mid span of a simply supported beam. |
Correct Ans Provided: 4
