A horizontal beam OX is uniform, is $4.0\,\text{m}$ in length and has a weight of $100\,\text{N}$. It is hinged to a wall at point O and held up by a cord XY that is fixed to the wall at Y. What is the tension in the cord?
- A$50\,\text{N}$
- B$58\,\text{N}$
- C$86\,\text{N}$
- D$100\,\text{N}$