
南一國中自然9上ch3-1
Authored by 南一 自然
Science
9th Grade
Used 8+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
蘇老師用20牛頓的水平推力去推動10公斤重的靜止箱子,5秒後,此水平推力作功多少焦耳?(假設箱子在無任何阻力的平面上運動)
100
200
400
500
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者施力作功為零?
手推嬰兒車向前進
原地將重物舉高
向心力作用於圓周運動中的小球
駕駛踩油門使車子加速
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列我們所學過的一些物理量中何項只有大小而不具方向性?
速度
加速度
功
合力
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一斜面長20公尺,高10公尺,今沿斜面施以30牛頓之力,可把一重50牛頓的物體由斜面底等速推升至斜面頂,此力共作功多少焦耳?
300
600
500
1000
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
宏嘉搬家時他把三個6公斤重的箱子由一樓搬運到六樓,他分三次搬運,因為體力的關係,所以費時分別為3、6、10分鐘,試問哪一次宏嘉對箱子所作的功最多?
第一次
第二次
第三次
三次皆相同
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在一光滑水平面上,用20牛頓的水平力分別作用於A、B兩靜止物體,已知質量A<B,則經過2秒後此力對哪個物體所作的功較大?
A
B
兩者皆相同
無法比較
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列選項中何者施力對物體作負功?
抱小孩等公車
提公事包上樓
汽車緊急煞車
重力使蘋果掉下
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