Here is another similar simulation.
You can play with 5 boats at a time. Enjoy it!

You can change river flow speed by drag red arrow horizontally (center of simulation region).
You can change the moving direction of each boat by dragging velocity arrow for each boat.
Click show will show actual moving direction.
Drag the rectangle dot can move boats in horizontal direction.
Click [b]start[/b] button to drive boats.

Questions to be asked:
Which boat will move to the other side with shortest travel time?
Which boat will move to the other side with shortest travel distance?
What is the trajectory for each boat?

Try to write down your answer before you click [b]start[/b] button. (click[b] init[/b] button to play it again).

translate strings in simulation to different language format before download
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Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(1043.6kB):double click downloaded file to run it. (24 times by 14 users) , Download EJS source View EJS source