A wooden ruler of uniform mass is supported on a pivot placed at its midpoint. A force of $2.0\,\text{N}$ is attached from each end of the ruler. The pivot provides an upward force $F$ on the ruler. What is $F$ equal to?
- A$2.0\,\text{N}$
- Bthe weight of the ruler
- C$4.0\,\text{N}$
- D$4.0\,\text{N}$ plus the weight of the ruler