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範例:二維的速度與加速度

一質點在平面上運動的位置座標為:x=3t-4t2;y=-6t2+t3,xy單位為米,t的單位是秒,(1)最初3.0秒的位移大小若干?(2)最初三秒的平均速度若干?(3)3.0秒末的瞬時速度若干?(4)最初3.0秒的平均加速度為若干?(5)t=3.0秒的瞬時加速度大小為若干?

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Posted in 平面運動量與向量.

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