國中自然3上_1-4
Quiz
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Fun
•
7th - 9th Grade
•
Practice Problem
•
Hard
Tang Da
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪一個物理量只具有大小,不具有方向?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
某物體沿直線運動,若加速度為零,則其速度應如何?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
若一運動物體的加速度為零,則其意義為何?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
一物體以2m/s之初速度滑進一粗糙的平面,經5秒鐘後完全停止,若減速過程所產生的等加速度為-0.4m/s2,則該物體自滑進粗糙面到完全停止的滑行距離為多少公尺?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
露露進行加速度運動,初速度為10m/s向北,2秒後速度變為20m/s向南,則他在此2秒內的平均加速度為何?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
附圖是某車在直線道路上行進的v-t圖,下列敘述何者錯誤?
0~2秒間的加速度為3m/s2
2~4秒間的加速度為-1m/s2
4~7秒間的加速度為0.5m/s2
7~9秒間的加速度為2m/s2
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
汽車在公路上以10m/s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煞車,汽車的v-t圖如附圖所示,則下列敘述何者正確?
在0.5秒的反應時間內,車子前進了10公尺
從開始煞車到停止,車子滑行距離為5公尺
從開始煞車後1秒鐘,車速為5m/s
從燈號轉為紅燈起到汽車完全靜止,車子共前進了15公尺
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