
B5C3_能量(功與熱)A卷
Quiz
•
Physics
•
9th Grade
•
Practice Problem
•
Hard
chungtsen chen
Used 22+ times
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40 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
天然氣、液化石油氣或汽油的燃燒,是由何者轉換成熱能和光?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
一斜面長 20 公尺、高 10 公尺,今沿斜面施以 30 牛頓之力,將一重 50 牛頓的物體由斜面底等速度推上至斜面頂,此力共作功多少焦耳?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有一人造衛星,於距離地面約 800 公里高度的軌道上繞地球赤道運轉,因其週期與地球自轉相同,所以此種衛星稱為同步衛星;由地面看此衛星,衛星好像是懸在高空中靜止不動。下列有關此衛星的敘述,何者正確?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列敘述中,哪一項外力沒有對物體作功?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
甲在 1 小時內,將一箱貨物由一樓搬至二樓,乙在 30 分鐘內,將同樣重的貨物由一樓搬至二樓,則甲、乙兩人所作的功,何人較大?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如圖為一木尺受到各力作用,求此木尺所受的合力矩大小為多少?
32gw-cm 順時針
8gw-cm 逆時針
32gw-cm 逆時針
16gw-cm 順時針
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
中華隊參加 2012 年倫敦奧運射箭比賽,若選手以手拉弓射箭,設箭的質量為 200 公克,用力拉弓施力 100 牛頓,使箭移動 10 公分,若不計箭飛行摩擦阻力,箭射出飛行最快速率可達多少公尺/秒?
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