理化功與能&圓周運動 - 運動
By Rae
at 2007-12-04T00:00
at 2007-12-04T00:00
Table of Contents
(1)圓周運動時物體加速度方向與速度方向相同嗎?(2)向心力為什麼只能改變運動方向,不能改變速度?(3)功=物體能量的變化,這是在沒有摩擦力的時候等號才成立嗎?(4)將一物體由拉起,越拉越高,不是只獲得位能嗎?為什麼也有動能?(5)圖片:http://my.twbbs.net.tw/photo/view?photoId=1311980有一人拉著F拖一物�
Tags:
運動
All Comments
By Caroline
at 2007-12-07T07:09
at 2007-12-07T07:09
By Bennie
at 2007-12-08T01:33
at 2007-12-08T01:33
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