
南一國中自然9上ch3-2
Quiz
•
Science
•
9th Grade
•
Practice Problem
•
Hard
南一 自然
Used 4+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
質量300公克的芒果,生長在距離地面2公尺的樹上,若重力加速度為10公尺/秒2,則芒果所具有的重力位能為多少焦耳?(假設地面為零位面)
3
6
30
60
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有一質量為2m、速度為v的玩具汽車具有動能E,則質量3m、速度2v的玩具貨車的動能為何?
4E
6E
8E
10E
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
小P將一300公克的乒乓球,從10公尺高自由落下,若該球的動能增加16焦耳,其餘能量在過程中散失,則散失的能量應為多少焦耳?(重力加速度=10m/s2)
10
12
14
16
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
清文將一質量為10公斤的金屬塊,讓此金屬塊以5公尺∕秒的等速度在光滑水平面上運動,而後此物受一定力作用8秒後速度變為21公尺∕秒,在此過程中動能增加了多少焦耳?
1080
1980
2000
2080
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
小名玩射擊遊戲手遊時,用200公克的子彈以200公尺∕秒的初速度打入牆內,子彈穿入0.5公尺後留在牆內,假設牆的阻力固定且無能量散失,則此阻力之大小為多少牛頓?
4000
8000
12000
16000
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
射箭選手施450牛頓的力將弦線拉滿,弦線上所搭的箭質量為100 g,此時箭和原來位置相比移動了10公分,若手拉弓的力量為平均,且不計阻力影響,則箭射出瞬間的速率應為多少公尺∕秒?
10
15
20
30
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
甫宜將一棒球做鉛直上拋,上升過程中,其動能和位能之間的變化情形何者正確?
位能減少,動能增加
位能增加,動能不變
位能、動能均隨之增加
位能增加,動能減少
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