
國三上理化Chap3_1 功與功率 2024 1102
Authored by Sone Wang
Physics
9th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
下列何項物理量,只有大小而不具有方向?
力
加速度
速度
功
2.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
下列何者施力作負功?
手提書包向前進
手抱小孩等公車
手提水桶上樓
汽車緊急煞車而減速
3.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
甲物體質量10公斤及乙物體質量5公斤,兩者皆靜止在水平桌面上,今各受10牛頓的水平作用力而移動10公尺時,則作用力對甲、乙作功的大小為何?
甲>乙
乙>甲
甲=乙
無法比較
4.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
有一個1公斤的物體在光滑水平面上做等速度運動,當其移動10公尺時,合力對物體作功為多少焦耳?
0
10
98
980
5.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
一顆芒果0.2公斤,由2公尺高的果樹上掉落到地面上,則重力對它作功多少焦耳?(1公斤重=9.8牛頓)
0.4
1.96
3.92
39.2
6.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
某人抱著一個重量為50牛頓的物體,沿水平地面走了2公尺,再垂直舉高4公尺置於一木櫃上。試問此人至少須作功多少焦耳?
0
100
200
300
7.
MULTIPLE CHOICE QUESTION
1 min • 5 pts
下列何者不是功率的單位?
焦耳
馬力
瓦特
瓩
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