A wooden block is kept at rest in a container of water by means of a string fixed to both the wooden block and the base of the container. The wooden block has mass $m$ and volume $V$. The water has density $\rho$. The acceleration of free fall is $g$. What is the magnitude of the force exerted on the block by the tension in the string?
- A$\rho g V$
- B$mg + \rho g V$
- C$mg$
- D$\rho g V - mg$