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0803test

Authored by 栢川 林

Physics

11th Grade

Used 1+ times

0803test
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10 questions

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1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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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?

1213g3L+5a\frac{1}{2}\sqrt{\frac{13g}{3L+5a}}

1215g2L+5a\frac{1}{2}\sqrt{\frac{15g}{2L+5a}}

1211g3L+7a\frac{1}{2}\sqrt{\frac{11g}{3L+7a}}

1215g3L+5a\frac{1}{2}\sqrt{\frac{15g}{3L+5a}}

1213g3L+7a\frac{1}{2}\sqrt{\frac{13g}{3L+7a}}

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 x=5sin(π2t+π6)x=5\sin\left(\frac{\pi}{2}t+\frac{\pi}{6}\right)  ,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?

 13\frac{1}{3}  

 11  

 23\frac{2}{3}  

 53\frac{5}{3}  

 22  

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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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/ s2s^2  )

10

20

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40

50

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

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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?

2πMRmg2\pi\sqrt{\frac{MR}{mg}}

2πmRMg2\pi\sqrt{\frac{mR}{Mg}}

2πMmRg\frac{2\pi M}{m}\sqrt{\frac{R}{g}}

2πmMRg\frac{2\pi m}{M}\sqrt{\frac{R}{g}}

2πRg2\pi\sqrt{\frac{R}{g}}

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?

2v2v

233v\frac{2\sqrt{3}}{3}v

vv

32v\frac{\sqrt{3}}{2}v

12v\frac{1}{2}v

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?

aR\sqrt{aR}

a2R\frac{a^2}{R}

R2a\frac{R^2}{a}

aR2\sqrt{aR^2}

a2R\sqrt{a^2R}

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

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 1cosθgsinθh\frac{1}{\cos\theta}\sqrt{\frac{g\sin\theta}{h}}

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