牛頓第一.二.三運動定運? - 運動
By Leila
at 2005-10-18T00:00
at 2005-10-18T00:00
Table of Contents
牛頓第一運動定律(慣性定律)如果物體不受外力作用,或受外力作用但合力為零時,則靜止的物體能然保持靜止,運動中的物體必沿著一條直線做等速度運動。牛頓第二運動定律物體所受外力的合力如果不為零,則必沿合力的方向產生一個加速度,此加速度的大小和外力的合力成正比,和物體的質量成��
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運動
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at 2005-10-22T20:46
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