國中自然3上ch2-3作用力與反作用力定律

Quiz
•
Physics
•
9th Grade
•
Hard
翰林出版國中自然 翰林出版國中自然
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者與牛頓第一運動定律的現象無關?
急停的車子,車上的人會向車前方傾倒
腳用力踢一靜止的足球,足球往前運動
拍打棉被可除去灰塵
大力搖果樹,果實會脫落
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
質量為 2 公斤的木塊,靜止在光滑水平面上,今受一水平力作用 4 秒,直線加速到 8 公尺/秒;若不計任何阻力的影響,則此作用力的大小為何?
16 牛頓
8 牛頓
4 牛頓
2 牛頓
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
不同質量的甲、乙兩物體,其作用力(F)與加速度(a)的關係如圖所示,則甲、乙的質量比為何?
2:3
1:1
5:9
1:5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一輛汽車在公路上等速行駛,下列敘述何者正確?
不受任何外力作用
受外力作用,合力不為零
受外力作用,合力等於零
受外力作用,加速度不是零
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一物體受數個力作用而產生加速度運動,則下列何者正確?
物體的加速度方向必與合力方向相同
物體的加速度方向必與合力方向互相垂直
物體的速度方向與合力方向互相垂直
物體的速度方向必與合力方向相同
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列各例中,何者以牛頓第三運動定律解釋最適當?
車子緊急煞車,車上乘客身體向前傾
用腳踢球,球向前滾去
用力揮動手臂,使沾在手上的水脫離飛出
火箭利用向後噴出廢氣的方式向前飛行
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
物體所受外力(F)與加速度(a)的關係如圖,請問該物體的質量為多少 kg?
2
2.5
5
10
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
火車天花板上懸吊著一物體,乘客發現物體往南擺高,代表火車的運動狀態為何?
向北行駛中,等速或加速都可能
向北行駛中,等速或減速都可能
向北減速行駛或向南加速行駛
向北加速行駛或向南減速行駛
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