Consider the following statements for a simply supported beam subjected to a couple at its mid – span?
1. Bending moment is zero at the ends and maximum at the centre
2. Bending moment is constant over the entire length of the beam
3. Shear force is constant over the entire length of the beam
4. Shear force is zero over the entire length of the beam
Which of the statements given above are correct?
(a) 1, 3 and 4 (b) 2, 3 and 4 (c) 1 and 3 (d) 2 and 4