Re: [問卦] 重力加速度 國中課本為什麼是9.8定值消失
※ 引述《nonpolar (Nonpolar)》之銘言:
: 國中課本為了簡化學習
: 直接說任何物體的重力加速度是9.8
: 大家不覺得奇怪嗎??
: 物體質量不同 質量不同所受的重力也不同
: 更別說墜落時的速度了 每一秒瞬間的速度都一直在變化
: 重力加上速度 這兩個值怎麼可能是定值???
: 是我多慮了嗎?
沒錯重力加速度9.8
你沒寫出單位
算了沒差
假設物質重力9,他的速度就是0.8
因為9.8-9
各位有沒有發現
物質重力如果大於9.8
他的速度就會開始變負的
反之那速度大於9.8
重力也會變負的
這樣懂了嗎
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