一物體若在鉛垂面上作等速率圓周運動,則下列敘述何者正確?(A - 運動
By Lydia
at 2008-05-14T00:00
at 2008-05-14T00:00
Table of Contents
請大家幫幫忙因為我不明白怎樣做呀﹗請大家附上過程和解釋呀﹗因為我不明白呀。1一物體若在鉛垂面上作等速率圓周運動,則下列敘述何者正確?(A)物體在各處所受到的向心力相等(B)重力對物體所作的功,在各處都相等(C)物體在最高點的速率比最低點的速率小(D)物體在最高點的速率比最低點的速率大
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運動
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