點解放張紙係書上面之後drop 佢落地..張紙會同本書同時落地?

2008-09-08 6:47 am
點解放張紙係書上面之後drop 佢落地..張紙會同本書同時落地?
點解放張紙係書上面之後drop 佢落地..張紙會同本書同時落地?

唔該哂

回答 (2)

2008-09-08 8:15 am
✔ 最佳答案
g is nearly 10ms-2
張紙係書上面,therefore no air resistant for紙
as a result 紙will fall FASTER than the book,
but since張紙係書上面,本書會頂住張紙,變成一齊落地
2008-09-08 6:57 am
因為地心吸力,繼而有勢能的存在

先撇除空氣阻力的因素

設紙的高度=h,書的高度=h

這樣紙和書就有同數值的勢能

所以兩者會同時墜地
參考: 自己理解


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