to my folk平静幸福--科普


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送交者: WandW 于 2009-11-02, 22:30:14:

This is wrong:
"给毛巾拧水的时候,到一定的程度就扭不动了,这是因为毛巾作用到你手上的力和你作用到毛巾上的力相等了,..."

The action and reaction are always equal and opposite.

Eg. you push a box. The action you exert on the box equals the reaction
of the box on you -- no matter the box moves or not.

I know that you are a good scientist. And I like your novel!




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