如圖的裝置要使懸線與鉛直方向夾角37°,則軸心旋轉的角速度為何?

0803test

Quiz
•
Physics
•
11th Grade
•
Hard
栢川 林
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10 questions
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1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
2.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
作簡諧運動之物體,其位置與時間關係為 ,其中x的單位是m,t的單位是s,則由開始至平衡點須耗時多少s?
3.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
小飛駕駛汽車通過山丘,山丘的剖面近似半徑為160 m的圓,如圖所示,若忽略摩擦力作用,則小飛車速不能超過多少m/s,汽車方能保持一直接觸地面?(重力加速度量值為10 m/ )
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4.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
設重力加速度量值為g。一質量為m的乾冰盤置於無摩擦的桌面上,以細線繫之,且線跨過桌子中央小洞而與質量為M的砝碼連接。今乾冰在桌面上作半徑為R的等速圓周運動,欲使砝碼不致升降,則乾冰運動的週期應為何?
5.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
一物體在光滑水平面上作簡諧運動,當其位移為振幅一半時,速率為v,則此物體通過位移為零之平衡點時的速率為下列何者?
6.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
洗衣機的圓筒作等速圓周運動,其距軸心的半徑為R,若轉動的加速度為a,則圓筒邊緣的水被甩出圓筒之速率為何?
7.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
有一質量為m之小珠,串於Y形桿上,如圖所示。該Y形桿繞鉛直軸旋轉,使小珠維持於一固定長度h處。若小珠與Y形桿間無摩擦,則下列敘述何者正確?
小珠作半徑hcosθ的圓周運動
小珠只受桿的正向力作用
如果小珠受桿的正向力大小為N,則小珠作圓周運動所需的向心力大小為Ncosθ
承上一選項,小珠受到的鉛直方向合力大小為Nsinθ
Y形桿旋轉的角速率ω為
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