選修物理I-6-1~6-2
Quiz
•
Physics
•
11th Grade
•
Medium
來加 以
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5 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
已知萬有引力大小為F=GMm/(r²)。黃晨想從重力常數G、地球表面的重力加速度g和地球半徑R去估算地球的質量M,不考慮地球自轉造成的離心力。她寫出的正確計算式應為下列何者?
M=GgR²
M=R²/Gg
M=gR²/G
M=GR²/g
M=Gg/R²
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
已知流域星之密度與半徑皆為地球的4倍,則自流域星表面以相同初速度及仰角拋射的質點,其水平射程為地球的多少倍?
0.25
2
0.0625
8
4
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
根據NASA最新報導,天文學家發現一顆巨大的類地行星--湖瑞星,其質量為地球的36.1倍、直徑為地球的1.9倍,湖瑞星像地球一樣擁有堅固的表層,因此被NASA歸類為「巨無霸行星」。假設湖瑞星與地球皆視為均質正球體,則湖瑞星表面的重力加速度約為地球的多少倍?
0.1
1.9
10
19
36.1
4.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
如圖所示,平面上存在兩固定質點,彼此距離為2a,而兩者質量為M,在兩質點連線之中垂線上,與連線之中點O相距x處,有一個質量為m的小質點,倘若此質點m原本靜止,受兩個固定質點M之引力,若x遠小於a,而開始作SHM。則質點m運動抵達O點時的速率大小為多少?
(x/a)·√(GM/2a)
(x/a)·√(GM/a)
(x/a)·√(2GM/a)
(2x/a)·√(GM/a)
(4x/a)·√(GM/a)
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
兩個相同密度與半徑之質量均勻正球體,緊緊靠在一起,試問兩正球體間的萬有引力量值和兩球半徑幾次方成正比?
−4
−2
−1
2
4
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