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12.某硬碟之碟盤以 7200rpm 進行等速率轉動,若此碟盤半徑為 3.5 英吋,試求此碟盤之角速度(rad\/sec)為何 (A) 120π (B) 144π (C) 240π (D) \
問題詳情
12.某硬碟之碟盤以 7200rpm 進行等速率轉動,若此碟盤半徑為 3.5 英吋,試求此碟盤之角速度(rad/sec)為何
(A) 120π
(B) 144π
(C) 240π
(D) u0004 720π
參考答案
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11.若不計空氣阻力,由高度 449 公尺的台北 101 大樓自由放下一小鋼球,請問此鋼球到達地面的瞬時速度為何 (假設 g=10m\/sec2 )? (A) 44.9m\/sec (B) 67
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