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2. 有一石階,每一階高 20 cm 寬 30 cm,令一物體自頂階(第 0 階)以初速 v0=5 m/s水平拋出,若重力加速度 g=10 m/s2,且不計任何阻力,則此物體將落於往下數的第幾階?(A
問題詳情
2. 有一石階,每一階高 20 cm 寬 30 cm,令一物體自頂階(第 0 階)以初速 v0=5 m/s水平拋出,若重力加速度 g=10 m/s2,且不計任何阻力,則此物體將落於往下數的第幾階?
(A) 9
(B) 10
(C) 11
(D) 12
參考答案
答案:D
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1. 有一額定為 220V、1800W 電熱器線,將其拉長三倍並平均剪為兩段後,取其中一段接至 110V 電源上,請問其消耗功率為何?(A)100W (B)500W (C)700W (D)1000W
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22. 已知坐標平面上有二次函數 y = −( x + 6 )2 + 5 的圖形,函數圖形與 x 軸相交於 (a , 0 )、(b , 0 ) 兩點,其中 a < b。今將此函數圖形往上平移,平移後函
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