- #1

KKuff

- 9

- 0

## Homework Statement

Here is the problem, I am able to calculate the velocity, but I don't know where to go from there.

A legendary Dutch boy saved Holland by plugging a hole in a dike with his finger, which is 1.10 cm in diameter.

(a) If the hole was 2.40 m below the surface of the North Sea (density 1030 kg/m3), what was the force on his finger?

(b) If he pulled his finger out of the hole, how long would it take the released water to fill 1 acre of land to a depth of 1 ft assuming the hole remained constant in size? (A typical U.S. family of four uses 1 acre-foot of water, 1234 m3, in 1 year.)

## Homework Equations

P

_{1}+ (1/2)[itex]\rho[/itex]v

_{1}

^{2}+ [itex]\rho[/itex]gy

_{1}= P

_{2}+ (1/2)[itex]\rho[/itex]v

_{2}

^{2}+ [itex]\rho[/itex]gy

_{2}

## The Attempt at a Solution

I calculated the velocity to be 5.238 m/s, but I have no idea how to get force from this (for part a) or time (part b). Am I missing some other equations?

Thanks