摘要:

The apparent weight of an hourglass is an excellent illustration of mechanics concepts. Impluse, momentum, center-of-mass motion, and gravitation all contribute. The average weight is unaltered, but tidal effects decrease the apparent weight while center-of-mass acceleration increases it.

ISSN:0031-921X    

DOI:10.1119/1.879900

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Homework in Physics courses usually deal with conceptual inquiries or numerical solution of theoretical problems. However,experimental homeworkis rather uncommon. I propose that certain physical situations properly simulated may be useful to encourage students to seek a solution behind the steps of the “experimental method.”

ISSN:0031-921X    

DOI:10.1119/1.879915

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Here is a physics trick involving tossing dice and catching them in a glass.

ISSN:0031-921X    

DOI:10.1119/1.1527619

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Brain-teasing torque demos are a part of every physics teacher’s repertoire. I can thank Ted Foster of Cal Poly, San Luis Obispo, for my personal favorite, the “torque rack.”

ISSN:0031-921X    

DOI:10.1119/1.879916

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

In this article I suggest the use of problems that yield a solution that challenges students’ expectations or are worded in such a manner that students obtain a wrong solution by making some obvious mistakes. The counterintuitive result or the wrong result is supposed to point out the inadequate initial analysis and subsequent solving method. Some examples of these two kinds of problems are provided and discussed.

ISSN:0031-921X    

DOI:10.1119/1.879917

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Nijhawan has published an intriguing demonstration that indicates that humans are partially able to correct for the time delays inherent in their vision. Nijhawan’s demonstration is briefly discussed and a simple apparatus for reproducing the demonstration is described.

ISSN:0031-921X    

DOI:10.1119/1.879918

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP

摘要:

Recently I came across a little diagram that aims to sell a new golf club—an “iron.” Read the description and examine the diagram, and then think, “Is this correct?”

ISSN:0031-921X    

DOI:10.1119/1.879919

出版商:American Association of Physics Teachers    

年代:1998

数据来源: AIP