20211116_11_能與力的關係、能量的型態
Quiz
•
Science
•
1st - 3rd Grade
•
Practice Problem
•
Medium
曾安邦 曾安邦
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8 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
一傘兵跳傘,正以等速度降落,在此過程中傘兵的動能與重力位能作何變化?
動能漸增,位能漸少
動能不變,位能減少
動能及位能之總和不變
動能減少,位能減少
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
一塊小石頭被垂直拋到空中,然後落地。對此過程之敘述,何者正確?
石塊在最高點時,位能最大
石塊上升時,力學能持續增加
石塊在落地瞬間,力學能最大
石塊落地時,加速度最大
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者不屬於力學能?
重力位能
彈力位能
熱能
動能
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列何者不是能量單位
焦耳
瓦特
度
卡
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
球重0.5公斤,被以10m/s的速率投出,則球的動能為若干?
25J
50J
100J
20J
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
等速上升的熱氣球,其動能與重力位能作何變化?
動能增加,位能減少
動能減少,位能增加
動能增加,位能不變
動能不變,位能增加
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
質量 1 kg 的石頭由地面搬到 2 m高的地方,位能增加多少焦耳?(設g=10 m/s2)
1
2
10
20
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