
速度與加速度
Quiz
•
Physics
•
10th Grade
•
Practice Problem
•
Hard
Sheila Si
Used 1+ times
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
下列選項的敘述何者正確?
平均速度量值等於平均速率
瞬時速率就是瞬時速度的量值
等速運動,其軌跡可能為曲線
速率不變的運動就是等速運動
2.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
一物體作加速度運動,其速度在10 s內改變量為100 m/s,則平均加速度為多少 m/s2?
1
10
50
100
3.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
下列有關運動狀態之敘述,何者正確?
速度漸增,加速度必漸增
有加速必有速度
瞬時速度為零時,必無加速度
加速度很大時,速度可能很小
4.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
加速度為向量,其方向和下列何者同方向?
位移
初速度
平均速度
速度變化
5.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
若 v 代表初速,a 代表加速度,則下列哪些情形速度必會變慢?
v>0;a>0
v<0;a>0
v ≠ 0;a<0
v>0;a ≠ 0
6.
MULTIPLE CHOICE QUESTION
15 mins • 5 pts
在直線上沿一定方向運動的物體,速度愈來愈快,則可能:
沒有加速度
加速度逐漸減少
加速度與速度反方向
加速度與運動方向垂直
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