112-9上理化ch3-1~3-3習作練習
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Medium
林 炳弘
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以 100 N 的水平推力,讓物體在 10 秒內水平移動了 3 公尺,則此力對物體作功的功率為多少?
60W
3000W
100W
30W
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以 100 N 的水平推力將物體沿水平方向推動 3 公尺,則此力對物體所作的功為多少?
300 焦耳
400 焦耳
500 焦耳
600 焦耳
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
小景以 10 N 的力量向上提起一重物,他先爬樓梯到 10m 高的地方,再下樓回到原地,則這段期間內小景對重物作功共多少焦耳?
0 焦耳
100 焦耳
200 焦耳
980 焦耳
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
阿晴手施力向上提著公事包走去車站,抵達車站靜止站立候車,直到車輛進站後上車找位置坐下。關於此過程的敘述,下列何者正確?
阿晴靜止站在公車站時,他的手對公事包有作功
阿晴手提公事包在水平路面走路,此時他的手對公事包有作功
阿晴手提公事包走上公車階梯,此時他的手對公事包有作功
阿晴將公事包放在座位旁邊,此時他的手對公事包有作功
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在光滑平面上,一外力對物體作功一段時間,物體的動能由 200 焦耳增加為 500 焦耳,則外力作功大小為多少焦耳?
200 焦耳
300 焦耳
500 焦耳
800 焦耳
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
某物體在粗糙平面上向右運動,運動過程中只受到向左方的摩擦力作用,經過一段時間後漸漸停止下來,請問物體所減少的動能和摩擦力所作的功有何關係?
摩擦力所作的功>減少的動能
摩擦力所作的功=減少的動能
摩擦力所作的功<減少的動能
無法比較
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有甲、乙、丙三顆相同的鐵球分別以不同的速率向右運動並撞擊黏土,如圖所示,試問何者撞擊黏土時可使黏土產生較大的凹陷?
甲
乙
丙
資料不足,無法判斷
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