This java applet shows effect of buoyant force acting on an object (less dense than water).
Your suggestions are highly appreciated! Please click email@example.com
Hwang, Dept. of physics,
Taiwan Normal University
Subject: interactive bouyancy demo Date: Thu, 3 Oct 2002 15:47:15 +0100 From: "porterl"
I am an retired Physics teacher ( always teaching in English Grammar schools, with pupils 11 to 18 years), during my time I would have given a lot for these interactive computer programs. I think I would have used them as revision aids rather that as primary teaching aids.
As a variation to your idea :-
I often got my students to hang a metal rod from a force meter, record it's weight . Then record the meter reading as the rod was lowered into water, also recording the depth of immersion. A graph would be drawn.
After discussion of the forces involved and exactly what force the meter was recording, the experiment was repeated but this time with a candle of the same dimensions as the metal rod . Most pupils found the reading of zero when the candle floated to be not what they expected..
Most straight line graphs produced by pupils in elementary Physics go through the 'origin' but the candle's one does not.
I am just in school for today and tomorrow to replace a teacher who is away.
Mr. Leslie Porter.P.S. Going home now to fly my kites, well when you are retired you can actually spend time on your hobbies. L.P.