ProblemsT.WindCurrent History

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March 15, 2009, at 04:48 AM by LFS -
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March 15, 2009, at 04:47 AM by LFS -
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October 15, 2008, at 09:56 AM by LFS -
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<param name="filename" value="http://mathcasts.org/gg/enliven/af/lines/systems/currentDual800.ggb"/>

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<param name="filename" value="http://mathcasts.org/gg/enliven/af/systems/currentDual800.ggb"/>

October 09, 2008, at 02:03 PM by LFS -
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September 22, 2008, at 02:18 PM by LFS -
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Click and drag the sliders to set the speed of the boat in still water and the speed of the current and direction of the boat.

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Click and drag the sliders to set: speed of boat in still water, speed of current and direction of boat.

September 22, 2008, at 01:28 PM by LFS -
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September 22, 2008, at 01:21 PM by LFS -
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Click and drag the sliders to set the speed of the boat in still water and the speed of the current.

to:

Click and drag the sliders to set the speed of the boat in still water and the speed of the current and direction of the boat.

September 22, 2008, at 12:23 AM by LFS -
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September 22, 2008, at 12:18 AM by LFS -
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<param name="filename" value="http://mathcasts.org/gg/enliven/af/lines/systems/current.ggb"/>

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<param name="filename" value="http://mathcasts.org/gg/enliven/af/lines/systems/currentDual800.ggb"/>

September 19, 2008, at 02:58 AM by LFS -
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\left\{ \matrix{ \color{red}{x + y = 60} \cr \color{blue}{x - y = 40} \cr} \right. \Leftrightarrow \left\{ \matrix{ x + y = 60 \cr \color{purple}{2x + 0y = 100} \cr} \right. \Leftrightarrow \left\{ \matrix{ x + y = 60 \cr \color{purple}{2x = 100} \cr} \right.

 

September 19, 2008, at 12:35 AM by LFS -
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September 15, 2008, at 03:09 PM by LFS -
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[table width=100%]

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[table width=825]

September 15, 2008, at 03:08 PM by LFS -
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September 15, 2008, at 03:06 PM by LFS -
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September 15, 2008, at 02:53 PM by LFS -
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Click and drag the sliders to set the speed of the boat in still water and the speed of the current.

Deleted lines 48-50:

<tr><td colspan=2>
<h2>Downstream</h2>
</td><td colspan=2><h2><input type="button" value="Upstream" onclick="window.open('http://mathcasts.org/mtwiki/Problems/WindCurrentUpstream','mywindow','width=825,height=500,resizable=yes')"></h2></td></tr>

September 15, 2008, at 02:36 PM by LFS -
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</td><td colspan=2><h2><input type="button" value="Upstream" onclick="window.open('http://mathcasts.org/mtwiki/Problems/WindCurrentUpstream','mywindow','width=825,height=350')"></h2></td></tr>

to:

</td><td colspan=2><h2><input type="button" value="Upstream" onclick="window.open('http://mathcasts.org/mtwiki/Problems/WindCurrentUpstream','mywindow','width=825,height=500,resizable=yes')"></h2></td></tr>

September 15, 2008, at 02:33 PM by LFS -
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September 15, 2008, at 02:26 PM by LFS -
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<tr><td colspan=4>

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<tr><td colspan=2>

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</td><td colspan=2><h2><input type="button" value="Upstream" onclick="window.open('http://mathcasts.org/mtwiki/Problems/WindCurrentUpstream','mywindow','width=825,height=350')"></h2></td></tr>
<tr><td colspan=4>

September 15, 2008, at 02:06 PM by LFS -
Deleted lines 61-73:

<h2>Upstream</h2>
<applet name="Animated" code="geogebra.GeoGebraApplet" codebase="./" archive="http://www.geogebra.org/webstart/geogebra.jar" width="800" height="300">
<param name="filename" value="http://mathcasts.org/gg/enliven/af/lines/systems/currentR.ggb"/>
<param name="framePossible" value="true"/>
<param name="showResetIcon" value="true"/>
<param name="enableRightClick" value="false"/>
<param name="showMenuBar" value="false"/>
<param name="showToolBar" value="false"/>
<param name="showToolBarHelp" value="false"/>
<param name="showAlgebraInput" value="false"/>

 

Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (<a href="http://java.sun.com/getjava">Click here to install Java now</a>)
</applet>

September 15, 2008, at 02:04 PM by LFS -
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<h2>Downstream</h2>

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<h2>Upstream</h2>
<applet name="Animated" code="geogebra.GeoGebraApplet" codebase="./" archive="http://www.geogebra.org/webstart/geogebra.jar" width="800" height="300">
<param name="filename" value="http://mathcasts.org/gg/enliven/af/lines/systems/currentR.ggb"/>
<param name="framePossible" value="true"/>
<param name="showResetIcon" value="true"/>
<param name="enableRightClick" value="false"/>
<param name="showMenuBar" value="false"/>
<param name="showToolBar" value="false"/>
<param name="showToolBarHelp" value="false"/>
<param name="showAlgebraInput" value="false"/>

 

Sorry, the GeoGebra Applet could not be started. Please make sure that Java 1.4.2 (or later) is installed and active in your browser (<a href="http://java.sun.com/getjava">Click here to install Java now</a>)
</applet>

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[tableend]

September 15, 2008, at 01:48 PM by LFS -
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[] Car Race Animated Activity

to:

[]Wind and River Current Problem Solving

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[]User speed and position of cars in a race to understand slope and intercept.

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[]Examines the idea of wind and river current adding and subtracting from the speed of plane or boat.

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[]6    (or any time after the idea of linear equations - does NOT require explanation of slope and intercept)

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[]8    (good problem for beginning systems of equations 2x2)

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[]Algebra and Functions AF at Math247
Algebra Algebra at Math247

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[]Algebra 1 AF at Math247
Matrix Algebra Algebra at Math247

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[]linear, equation, rate, slope, intercept, dynamic, freeware, applet, offline, online

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[]linear, equation, system, 2 variables, algebra, dynamic, freeware, applet, offline, online

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[]This activity is suitable for younger children - just change the questions!

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[]Images are terrible - looking for new ones :)

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[]Zip for offline use

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[]coming soon

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[]LFS - contact

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[]LFS - contact

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September 14, 2008, at 01:48 PM by LFS -
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September 14, 2008, at 01:47 PM by LFS -
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<applet name="Animated" code="geogebra.GeoGebraApplet" codebase="./" archive="http://www.geogebra.org/webstart/geogebra.jar" width="810" height="300">

to:

<applet name="Animated" code="geogebra.GeoGebraApplet" codebase="./" archive="http://www.geogebra.org/webstart/geogebra.jar" width="800" height="300">

September 14, 2008, at 01:47 PM by LFS -
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[table border=1 cellpadding=3 width=810]

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[table border=1 cellpadding=3 width=825]

September 14, 2008, at 01:42 PM by LFS -
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September 14, 2008, at 01:39 PM by LFS -
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[table border=1 cellpadding=3 width=810]

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[table border=1 cellspacing=3 width=825]

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September 13, 2008, at 11:14 PM by LFS -
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A boat went 15km downstream in 20 minutes and then upstream 50km in 2 hours. At what speed would a piece of driftwood move in this river? ssume that the speed of the boat in still water and speed of the current of the river are constant.
to:
A boat went 15km downstream in 20 minutes and then upstream 50km in 2 hours. At what speed would a piece of driftwood move in this river? Assume that the speed of the boat in still water and speed of the current of the river are constant.
September 13, 2008, at 11:13 PM by LFS -
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A boat travels downstream on a river at 60 km/h. It travels upstream on the same river at 40 km/h. What is the speed of the boat in still water and the speed of the current of the river? Assume the boat's speedometer shows a constant speed and that the river current is constant. or Assume that the speed of the boat in still water and speed of the current of the river are constant.
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A boat went 15km downstream in 20 minutes and then upstream 50km in 2 hours. At what speed would a piece of driftwood move in this river? Assume the boat's speedometer shows a constant speed and that the river current is constant.
to:
A boat went 15km downstream in 20 minutes and then upstream 50km in 2 hours. At what speed would a piece of driftwood move in this river? ssume that the speed of the boat in still water and speed of the current of the river are constant.
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September 13, 2008, at 11:11 PM by LFS -
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A boat travels in still water at a constant speed. When it travels downstream on River A, the speed of the boat is 60 km/h. When it travels upstream on the same river, its speed is 40 km/h. What is the speed of the boat in still water and the speed of the current of River A?
to:
A boat travels downstream on a river at 60 km/h. It travels upstream on the same river at 40 km/h. What is the speed of the boat in still water and the speed of the current of the river? Assume the boat's speedometer shows a constant speed and that the river current is constant. or Assume that the speed of the boat in still water and speed of the current of the river are constant.
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A boat travels downstream at 60 km/h and upstream at 40 km/h. With what speed would a raft travel?
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A boat travels downstream at 60 km/h and upstream at 40 km/h. With what speed would a raft move?
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A boat travels in still water at a constant speed. The boat went 15km downstream in 20 minutes and then upstream 50km in 2 hours. At what speed would a piece of driftwood move in this river?
to:
A boat went 15km downstream in 20 minutes and then upstream 50km in 2 hours. At what speed would a piece of driftwood move in this river? Assume the boat's speedometer shows a constant speed and that the river current is constant.
September 13, 2008, at 11:00 PM by LFS -
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[table width=100%]

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[table border=1 cellpadding=3 width=825]

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September 13, 2008, at 10:50 PM by LFS -
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[table border=1 cellpadding=3 width=825]

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September 13, 2008, at 10:23 PM by LFS -
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Page last modified on March 15, 2009, at 04:48 AM