
0727test
Authored by 栢川 林
Physics
11th Grade
Used 1+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
一質點作等速圓周運動時,當半徑為r、速率為v時,其向心力為Fc。若半徑加倍,但向心力不變時,此時的速率變為原來的幾倍?
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
英國遊玩著名景點「倫敦眼」(London Eye,又稱千禧之輪),它是一座半徑75 m鉛直豎立的巨大摩天轉輪,圓周上設有數個觀景座艙以等速率旋轉。某日正午(日光垂直地面照射)測出當座艙抵轉輪最高點時其在水平地面上影子的速率為25 cm/s,依此估算「倫敦眼」的角速度量值為多少rad/s?
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
有一輛汽車在傾斜角為的路面轉彎,當其車速為v時,汽車可以不依靠路面與車輪的側向摩擦力即能安全過彎。已知汽車轉彎的曲率半徑為r,則此時的車速量值?
4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
長25 cm之輕繩,上端固定於天花板,下端懸掛6 kg之物體,若物體在水平方向作等速圓周運動(如圖所示),θ = 53°,重力加速度量值為10 m/s2,則其張力與週期分別為何?
張力為100 N,週期為 s
張力為80 N,週期為 s
張力為100 N,週期為 s
張力為80 N,週期為 s
張力為100 N,週期為 s
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
在公路轉彎處,外側路面較內側路面高,以方便汽車轉彎。若忽略地面摩擦力時,則汽車轉彎所需向心力為何?
車子的重量
車子重量平行傾斜路面的分量
傾斜路面的正向力
傾斜路面正向力的鉛直分量
傾斜路面的正向力和車子重量的合力
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
一質點作半徑0.1 m的圓周運動時,當其速率為2 m/s時,當時的向心加速度為多少m/s2?
10
20
30
40
50
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
一物體在光滑水平面上繞一定點作半徑為2 m之等速圓周運動,在 s內,物體運動方向改變30°,則此物體之向心加速度為多少m/ ?
2
4
6
8
10
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