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範例:相對運動

一家百貨公司的電扶梯全長為15m，正以1.0m/s的速度運行，由一樓升至二樓。(1)某甲由一樓地面跨上電扶梯後，即以2.0m/s相對於梯面的速度在扶梯上快走，則此人從一樓升至二樓需經多少時間?(2)某乙欲從二樓下至一樓，卻誤走入上升中的電扶梯，假設他以2.0m/s相對於梯面的速度在扶梯上快步往下走，則此人從二樓下至一樓需經多少時間?

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By admin – 2010 年 08 月 10 日

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