A fixed-ended beam of span L carries a point load P at a distance a from the left end and b from the right end, where L equals a plus b. What is the magnitude of the fixed-end moment at the left end?
Correct answer: A. Pab squared divided by L squared
- A. Pab squared divided by L squared
- B. Pa squared b divided by L squared
- C. Pab divided by L
- D. P times L divided by ab
Explanation
For a point load on a fixed-ended beam, the magnitude of the left fixed-end moment is Pab squared divided by L squared. The corresponding right-end magnitude is Pa squared b divided by L squared, so the two moments are generally unequal when the load is eccentric.
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