
國三上理化Chap2_4 圓周運動與萬有引力 2024 1031
Authored by Sone Wang
Physics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
據說牛頓由蘋果自樹上掉落的現象而發現了萬有引力,請回答下列問題:
(1)蘋果從樹上鉛直掉落至地面的過程中,下列敘述何者正確?
整個過程為等速度運動
整個過程的加速度越來越大
蘋果掉落的速度與加速度的方向相反
位移與加速度的方向相同
2.
FILL IN THE BLANK QUESTION
2 mins • 10 pts
據說牛頓由蘋果自樹上掉落的現象而發現了萬有引力,請回答下列問題:
(2)此顆蘋果掉落至地面的瞬間,其加速度大小為多少m/s2?
(請填入 4.9 或 9.8 或 14.7 或 19.6)
3.
DROPDOWN QUESTION
2 mins • 10 pts
康康用10 kgw的力去抬一個放置在地面上,重量為30 kgw的水泥磚,結果水泥磚一動也不動,請回答下列問題:
(1)水泥磚施於康康的反作用力大小為何? (a)
4.
DROPDOWN QUESTION
2 mins • 10 pts
康康用10 kgw的力去抬一個放置在地面上,重量為30 kgw的水泥磚,結果水泥磚一動也不動,請回答下列問題:
(2)水泥磚對地球的引力大小為何? (a)
5.
DROPDOWN QUESTION
2 mins • 10 pts
康康用10 kgw的力去抬一個放置在地面上,重量為30 kgw的水泥磚,結果水泥磚一動也不動,請回答下列問題:
(3)此時地面對水泥磚的支撐力大小為何? (a)
6.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
韋伯望遠鏡在宇宙中發現一組雙星互相繞著對方運行,如圖所示,已知甲星的質量比乙星大,但兩顆星球體積一樣,請回答下列問題:
(1)關於甲、乙之間受到彼此的萬有引力,下列敘述何者正確?
甲受到乙的萬有引力較大
乙受到甲的萬有引力較大
甲受到的萬有引力,反作用力是甲受到的離心力
乙受到的萬有引力,反作用力是甲受到的萬有引力
7.
MULTIPLE CHOICE QUESTION
2 mins • 10 pts
韋伯望遠鏡在宇宙中發現一組雙星互相繞著對方運行,如圖所示,已知甲星的質量比乙星大,但兩顆星球體積一樣,請回答下列問題:
(2)關於甲星球表面和乙星球表面的重力加速度,下列敘述何者正確?
甲星球表面的重力加速度較大
乙星球表面的重力加速度較大
甲、乙兩星球重力加速度一樣
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