
802 難 6-1 6-2
Science
8th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1. 下列哪一項工具,是利用「受力後長度明顯改變,且改變量有規律性」的特性來測量力的大小?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2. 一個在地球上質量為 72 公斤的物體,若將其帶到月球表面,關於其質量與重量的變化,下列敘述何者最合理?(已知物體在月球表面所受的重力約是地球的六分之一)
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3. 當我們用力的箭頭圖示來表示一個力時,除了箭頭的長度(代表力的大小)和箭頭指向(代表力的方向)之外,還必須清楚標示下列哪一點?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
4. 當一個物體受到一對力作用,但仍然保持靜止不動的狀態,則這對力最可能具有下列哪一種特性?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
5. 甲、乙兩力同時作用在同一物體上,若甲力為 45 公克重向南,乙力為 25 公克重向南,則此物體所受的合力大小與方向為何?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6. 一艘船隻同時受到兩個水平力作用:一個向西 150 gw,另一個向東 80 gw,則船隻所受的合力大小與方向為何?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
7. 小華試圖用 30 kgw 的水平推力推動一個靜止的書櫃,但書櫃仍舊紋風不動。根據力的平衡原理,此時書櫃所受到的靜摩擦力大小與方向為何?
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