
0806 石牌校國三理化小考
Quiz
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Physics
•
9th Grade
•
Practice Problem
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
1. 一球從高樓釋放,到達地面需花費 5 秒,落下時的加速度為多少?
19.6 m/s2
39.2 m/s2
49.0 m/s2
9.8 m/s2
2.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
2. 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
3.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
3. 如圖,玻璃管內放入銅幣及一片羽毛,並且抽成真空,將它迅速倒轉,兩者從管頂同時落下,會同時落至管底。這現象顯示出在管內的銅幣及羽毛的情形為下列何者?
重量相同
均作速度不變的等速度運動
加速度相同
沒有重量
4.
MULTIPLE SELECT QUESTION
10 mins • 1 pt
4. 將500公克的小球鉛直上拋,令其達到最高點後又落下至原處,則小球在最高點的瞬間速度大小為多少m/s?
0
4.9
9.8
19.6
5.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
5. 在教室內手拿一片羽毛和一個銅幣,同時放開讓他們自由落下。則羽毛和銅幣何者先著地?
同時著地
羽毛先著地
銅幣先著地
無法判定何者先著地
6.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
6. 下列有關自由落體的敘述(不計空氣阻力),何者正確?
物體落下過程中,每秒的速度變化量相等
高度不同時,落地的速度都相同
物體落下過程中,速度和加速度同時增大
物體質量不同時,落下的加速度也不相等
7.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
7. 甲、乙、丙三粒小球皆位於距地面20米的高樓頂,甲球以水平速度2m/s射出、乙球以水平速度4m/s射出、丙球以水平速度6m/s射出,則皆經1秒的時間長度時,三粒小球所落下的垂直距離,下列敘述何者正確?
甲球最小
丙球最大
甲、乙、丙的垂直距離比為3:2:1
三球落下之垂直距離相等
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