
國中自然3上ch2-4圓周運動與萬有引力
Authored by 翰林出版國中自然 翰林出版國中自然
Physics
9th Grade
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8 questions
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1.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
圖為一顆球作圓周運動的情形,則球在甲處時所受到的合力方向為何?
a
b
c
d
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
人造衛星繞地球作圓周運動,地球吸引人造衛星之力為P,人造衛星繞地球的向心力為Q,P與Q的關係為何?
P=Q
P=2Q
2P=Q
兩者無關
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某星球質量為其衛星的9倍,則星球吸引衛星的力F1與衛星吸引星球的力F2,兩者比為何?
81:1
1:81
1:1
9:1
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
附圖為一顆球受繩力作圓周運動的情形,則球在甲處時若繩子斷了,則球的運動方向為何?
a
b
c
d
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列何者不是慣性的現象?
物體維持靜止
物體的加速度為零
物體作等速率直線前進
月球繞地球運動
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
下列哪一種運動需要受向心力的作用?
等速度運動的物體
自由落體運動
汽車緊急煞車
月球繞地球運行
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
有關等速率圓周運動的敘述,下列何者錯誤?
向心力及加速度永遠指向圓心
向心力及加速度的方向永遠和速度的方向垂直
向心力能改變運動快慢
當向心力消失時,做圓周運動的物體會因慣性作用,而沿圓的切線直線飛出
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