A gate is $2$ m wide and $2\mathrm{.}4$ m tall and hinged at the bottom. On one side the gate holds back a $2-$m$-$deep body of water. On the other side, a $6-$cm$-$diameted water jet hits the gate at a height of $2$ m $.$ What jet speed $V$ is required to hold the gate vertical? Answer in SI unit. $(4$ points$)$