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A horizontal bar with a constant cross-section is subjected to loading as shown in the figure. The Young's moduli for the sections AB and BC are 3E and E, respectively.
For the deflection at C to be Zero, the ratio P/F is __________
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- 5
- 3.9
- 4
- 4.1
Correct Option: C
(δ)c = O 
δlAB + δlBC = O
| + | = 0 | ||
| A(3E) | AE |
| + | = 0 | ||
| 3 | 1 |
3F = P – F
| = 4 | |
| F |
