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初中
大逼兜
大逼兜

請問是為什麼

功 时间 著棒球上升到最高點,接著棒球往下落到手中,棒球剛落入手時動能 為K,若空氣阻力不可忽略不計。可知: 6 如右圖所示,若將棒球垂直向上拋,棒球剛離開手時動能為K,接 WK,>K,摩擦力作正功 (B)K>K,摩擦力作負助 CK<K,摩擦力作正功 DK<K,摩擦力作自助 Kz < Ki
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