下列哪一物理量,同時表示物體位置移動的大小及移動的方向?
112上第一次段考範圍之平時考

Quiz
•
Science
•
9th Grade
•
Medium
JOESPH HSU
Used 2+ times
FREE Resource
18 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
位置
路徑長
位移
距離
Answer explanation
位移有方向性
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某新款高鐵列車在 10 秒鐘內,能自靜止以等加速度加速,至最高速度 100 m/s,則加速度大小約為多少 m/s2?
0.5
1
2
10
Answer explanation
加速度==10(m/s2)
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
如圖中,第 4 秒的加速度大小為何?
0 m/s2
0.75 m/s2
1 m/s2
1.5 m/s2
Answer explanation
速度沒有變化,加速度為 0
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一物體自一高塔頂,由靜止落下,不計空氣阻力,則 3 秒末時的速率為多少公尺/秒?(重力加速度為 9.8 公尺/秒2)
9.8
19.6
29.4
44.1
Answer explanation
v=9.8×3=29.4(公尺/秒)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
關於速度與速率的敘述,下列何者錯誤?
速率只代表快慢
速度具有方向性
物體運動方向不變時,速度的大小等於速率
等速率運動一定是等速度運動
Answer explanation
當方向不變時等速率運動一定是等速度運動
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者不是慣性定律的現象?
物體維持靜止
物體的加速度為零
物體作等速率直線前進
物體作加速度運動
Answer explanation
慣性定律是當物體不受外力或合力為0時;當物體作加速度運動物體必受外力或合力不為0
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有關地下水的敘述,下列哪一項錯誤?
臺灣西南部的嚴重地層下陷,是超抽地下水之故
在旱季,供應河水、湖泊及瀑布的主要水源是地下水
地下水面的高低會隨著雨量而上下變動
雨季時,地下水面較低
Answer explanation
雨季時地下水含量增多,地下水面較高
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