1. 要描述物體的位置,下列敘述何者錯誤?

0729 木柵校國三理化小考

Quiz
•
Physics
•
9th Grade
•
Medium
Cindy Cindy
Used 1+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
將物體看成一個點
通常選擇較明顯的目標當作基準點
可以用數線或座標來描述物體的位置
描述物體的位置時,不需考慮方向性
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
2. 佳蓉沿半徑為 50 公尺的圓周跑二分之一圈,則她的位移大小為多少?
50π 公尺
0 公尺
200 公尺
100 公尺
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
3. 有三個單擺其資訊如下列所示,試問三者週期大小順序為何?
(甲)擺長25cm,擺角5°,擺錘質量100g;
(乙)擺長50cm,擺角4°,擺錘質量200g;
(丙)擺長100cm,擺角3°,擺錘質量500g。
(甲)>(乙)>(丙)
(甲)<(乙)<(丙)
(甲)=(乙)=(丙)
(乙)>(甲)>(丙)
4.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
4. 大雄站在月臺上,此時自強號火車以 18 km/hr 等速度通過月臺,若車頭通過大雄時開始計算時間,車尾通過時停止計時,碼表指針停在 10.0 秒的位置上,則自強號列車總長為多少公尺?
180
100
90
50
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
5. 如圖為甲、乙、丙三車的 x-t 圖。由圖形上可判斷哪一車的速率最慢?
甲
乙
丙
無法判斷
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
6. 附圖是某物體位置-時間關係圖,以東方為正方向,試求該物體在 20 秒末位置為何?
東方 50 公尺
東方 25 公尺
西方 50 公尺
西方 25 公尺
7.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
7. 甲、乙兩人騎腳踏車沿一筆直公路運動,5 秒內其位置和時間的關係記錄如表所示,由表得知在這 5 秒內,誰騎得較快?
甲
乙
丙
無法判斷
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