Avg. water velocity

1. Nov 8, 2007

1. The problem statement, all variables and given/known data

Water is pumped into a storage tank from a well delivering 17.0 gallons of water in 29.0 seconds through a pipe of 1.00 in.^2 cross-sectional area. What is the average velocity of the water in the pipe as the water is pumped from the well?

A=1in^2

the answer should be in inches/second.

I converted 17gal./s. to 22m^3/s = 866.14in^3/s, but i'm not sure what equation i need to use to get started.

Some assistance getting started would be appreciated.

thanks

2. Nov 8, 2007

rl.bhat

Volume of water = area of cross section of pipe x length of the water tube.
Therefore V/s = Area x L/s

3. Nov 8, 2007

physicsbhelp

In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 58 m/s (terminal speed), that his mass (including gear) was 85 kg, and that the force on him from the snow was at the survivable limit of 1.2 105 N.

(a) What is the minimum depth of snow that would have stopped him safely?

?m

(b) What is the magnitude of the impulse on him from the snow?

? kg·m/s

can some one HELP ME ON THIS PROBLEM???

4. Nov 8, 2007

hiddenbyleaves

I didn't understand rl.bhat's explanation. What's V/s? Also the length of tube is NOT given. Can someone explain please?
Thanks

5. Nov 8, 2007

physicsbhelp

v/s is velocity over displacement.

6. Nov 8, 2007

aq1q

no volume/seconds

7. Nov 9, 2007

rl.bhat

Average velocity = (Volume/Second)/Area
You have calculated volume of water. Time is given. Find the average velocity.

8. Nov 9, 2007

aq1q

yup L/S is the velocity like how rl.bhat put it in the second post.