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B1-5-2簡諧運動

Authored by 來加 以

Physics

11th Grade

Used 1+ times

B1-5-2簡諧運動
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5 questions

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1.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

把鼻是隻貓,牠正進行SHM之思想實驗:牠沿x軸作簡諧運動,若把鼻位置與時間的關係為 x=8cos[(πt/4) + (π/3)]cm,式中t以s計,則把鼻的最大速率為多少cm/s? 

0.8π

1.2π

1.6π

2.0π

2.4π

2.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

妞妞是一隻貓,牠在x軸上進行振幅為R、週期為T的SHM思想實驗,當妞妞距平衡點的距離為(3/5)R時,其加速度的量值為何?

-(12π²R)/(5T²)

-(16π²R)/(5T²)

-(3π²R)/(5T²)

-(4π²R)/(5T²)

-(5π²R)/(4T²)

3.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

小齊同學為了量測講桌高度,將一條無質量的細繩,裁剪成與講桌相同高度,並在細繩下端黏上一塊鋼珠,使鋼珠作小角度的單擺。若小齊利用手機測得鋼珠的擺動週期為5 s,則講桌高度約為多少m?(令重力加速度量值為10 m/s²;π² = 10)

1

2.25

6.25

0.25

9

4.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

哈奇是條狗,牠正在進行一個簡諧運動思想實驗,假設哈奇的振幅為R,最大加速度量值為a,則由平衡點算起,1/2週期內的平均加速度值為何?

0

πa/2

2a/π

(π/2)[√(R/a)]

(2/π)[√(a/R)]

5.

MULTIPLE CHOICE QUESTION

10 mins • 1 pt

Media Image

不計所有摩擦力及空氣阻力,桌面上有一質量為2.5 kg的鋼體,已知此球在桌面上不同的位置時,會受到不同大小及方向的力之作用,其所受合力與位置關係如圖所示。若在某時刻此鋼體在位置=8 m的地方且速度恰為0。試問再經π 秒後此鋼體的速度量值為多少m/s?

0

8

π

8/π

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