Physics B problem

Test Preparation AP Test Preparation
1

<p>I have the Giancoli text and I ran accross this lvl III problem (pg 44 , #48) on the hmwk:</p>

<p>Suppose you adjust your garden hose nozzle for a hard stream of water. You point the nozzile vertically upwatd at a height of 1.5 m above the graound. When you quickly move the nozzle away from the vertical, you hear the water striking the ground next to you for another 2.0 secs. What is the speed as it leaves the nozzle</p>

<p>the drawing is something like this. The hose is the dash, the water is the x, the side dash is the length above the ground:</p>

<pre><code>X
</code></pre>

<p>X X
X X
X X
X X
| | X
| | X
| | X
| | X
X |
X | > 1.5 m
X |
X |</p>

<ul>
<li>I got 4.2 m/s after a bunch of algebra, can someone tell me if thats right and work it out possibly?</li>
</ul>

2

<p>x then it comes curving down in a parabola, the hose is 1.5 m from the ground
x
x
[ ]
[ ]
[ ]
[ ]
|
| > 1.5 m
|</p>

<ul>
<li>sorry for the bad illustration. I can't get it to work right</li>
</ul>

3

<p>d = v0t + 1/2at^2
-1.5 = v0 (2.0) + (1/2)(-9.8)(2.0)^2
-1.5= 2v0 - (19.6)
18.1 = 2v0
9.05 = v0</p>

<p>9.05 m/s</p>