
南一國中自然9上ch3-3
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Hard
南一 自然
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列常用的單位,何者並非力矩的單位?
kg×m
N×m
gw×cm
N×cm
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有一水平木棒長度未知、重量不計,清文以距左端10cm處為支點時,左端向上施力20N、右端向上施力10N可達到平衡,則此棒長度為多少公分?
20
40
60
80
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列關於力矩這物理量的敘述,何者錯誤?
力矩不具方向性
施力在物體上不一定會讓物體轉動
力矩可讓物體旋轉
力的作用線到支點的垂直距離為力
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
當兵拉單槓時,若兩手臂施力點的距離分越開,會越省力還是越費力?
越費力
越省力
無差別
看當時身體狀況
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
欲使一物體在受力後不移動也不轉動,所需之條件為何?
作用在物體上的合力與合力矩均不為零
作用在物體上的合力為零,合力矩不為零
作用在物體上的合力為不為,但合力矩為零
作用在物體上的合力為零,合力矩為零
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列三個球的運動狀況,其合力與合力矩都不為零的有哪幾個?(甲)草皮上往前滾動的皮球;(乙)棒球投手所投出的四縫線快速直球;(丙)保齡球選手所擲出的飛碟球。
甲乙
乙丙
甲丙
甲乙丙
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一座橋長約80公尺,重約60公噸,左、右二端各有一個橋墩支撐,今在距左邊橋墩30公尺處有一8公噸重的大卡車拋錨停在那,此時左右二橋墩各承受多少公噸重的力?
左3;右5
左5;右3
左33;右35
左35;右33
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