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Clearnote
Q&A
Senior High
Physics
請問這題怎麼寫?
Physics
Senior High
8 monthsago
Hilda
請問這題怎麼寫?
6. 一棒球飛向二壘的正上方,球與二壘的水平距離為6.0m時,教練開始計時,此時球的高 度為1.8m,速度為20ms水平向前。若忽略阻力,則下列有關此球運動的敘述哪些正 確?(此題假設重力加速度為10 m s²) (A) 0.3s 時球升至二壘正上方(B)飛至二壘正上方時,水平速度分量大於20ms⑤ ) 0.3' s時球的高度為1.35m (D)球落地點與二壘間的水平距離為6.0m (E)若球與地 面作彈性碰撞,則反彈後的最高點與二壘間的水平距離為12 m。 IDM/
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