九上理化3-3
Quiz
•
Science
•
9th Grade
•
Hard
房繼誠教務處教師 房繼誠教務處教師
Used 25+ times
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20 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
1.以固定大小的力推動物體,若物體沿水平地面等速度移動,請問下列關於此過程的描述,何者正確?
物體所受合力必為零
重力對物體有作功
此人的推力對物體所作的功為零
物體的動能與重力位能的總和必為零
2.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
3.NBA 籃球賽裁判開球時會將籃球垂直上拋,籃球在上拋的過程中,下列敘述何者正確?
籃球在上升過程中,重力位能逐漸減少
籃球到達最高點的瞬間,所受合力為零
籃球在上升過程中,動能逐漸減少
籃球在上升過程中,重力加速度逐漸變小
3.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
4.質量 4 kg 的物體由靜止狀態受 20 牛頓外力作用,使其在光滑水平面上加速度移動 3 公尺,繼續改以 17 牛頓外力作用,使其加速度移動 4 公尺,不考慮其他阻力之下,以下敘述何者正確?解:最後動能=20×3+17×4=128(焦耳),128=×m×v2=×4×v2,......。
最後動能為 64 焦耳
最後動能為 148 焦耳
末速為 8 公尺/秒
末速為 4 公尺/秒
4.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
5.沿鉛直線拋上的物體,高度愈是增加,下列敘述何者正確?
位能、動能均隨之增加
位能增加,動能不變
位能減少,動能增加
位能增加,動能減少
5.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
6.下列各項發電方式其能量轉換情形的敘述,何者錯誤?
水力發電將位能轉變成電能
太陽能發電將光能轉變成電能
核能發電將核能轉變成電能
火力發電將動能轉變成電能
6.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
7.有一貨車自斜坡等速度滑下,有關貨車能量的變化,下列敘述何者正確?
位能減少,動能增加
位能增加,動能減少
位能、動能皆減少
位能減少,動能不變
7.
MULTIPLE SELECT QUESTION
15 mins • 1 pt
8.下列敘述何者正確?
地面上物體沒有作功的本領,因其位能必為零
相同高度各物體的位能相同
相同高度下,質量較大的物體其位能較大
物體自高處自由落下,其位能減少,動能不變
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