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1. |
A cantilever beam of length 2 m with a square section of side length 0.1 m is loaded vertically at the free end. The vertical displacement at the free end is 5 mm. The beam is made of steel with Young’s modulus of 2.0 × 1011 N/m2. The maximum bending stress at the fixed end of the cantilever is _______ |
A. | 20.0 MPa |
B. | 37.5 MPa |
C. | 60.0 MPa |
D. | 75.0 MPa |
Answer» C. 60.0 MPa | |