1. 一人沿直線跑步,其速度與時間關係如圖所示,試問在哪一段時間內加速度方向與速度方向相反?

0807 木柵校國三理化小考卷

Quiz
•
Physics
•
9th Grade
•
Hard
Cindy Cindy
Used 1+ times
FREE Resource
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
0~t1
t1~t2
t1~t3
t2~t3
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
2. 一車子沿直線自靜止做等加速度運動時,其位置與時間的關係圖為下列何者?
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
3. 下列各加速度-時間關係圖(a-t 圖)中,何者能表示一物體由空中自由落下的運動狀態?
4.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
4. 某新款高鐵列車在 10 秒鐘內以等加速度加速至最高時速 100 m/s,則加速度大小約為多少 m/s2?
0.5
1
2
10
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
5. 汽車在公路上以 10 公尺/秒的速率直線前進,駕駛發現前方路口燈號轉為紅燈,經過 0.5 秒的反應時間後開始踩剎車,汽車車速(v)隨時間(t)變化關係如圖所示,下列敘述何者錯誤?
在 0.5 秒的反應時間內,車子前進了 5 公尺
從開始剎車到停止期間,車子的加速度為負值
從開始剎車後 1 秒鐘,車速為 5 公尺/秒
從燈號轉為紅燈起到汽車完全靜止,車子共行駛了 1.5 秒
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
6. 阿翰在 2000 公尺體能測驗中,在直線時以相同速度向前,此段時間他的速度-時間關係圖(v-t 圖)可能為下列何者?
7.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
7. 一物體在一直線上通過 A、B 兩點,作等加速度運動,已知 A、B 間的距離為 100 m,物體由 A 至 B 所經過的時間為 5 秒,若通過 A 點的速度為 10 m/s,則此物體通過 B 點時的速度為何?
20 m/s
30 m/s
40 m/s
50 m/s
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