108國中自然3上B5_3-1
Quiz
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Fun
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KG
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Practice Problem
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Medium
Yu Liu
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列何者的作用力對「物體」沒有作功?
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列何者施力作負功?
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
關於功的敘述,下列何者正確?
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
一個80公斤的行李箱在光滑水平面上受外力的合力作用,以2 m/s等速度前進10公尺。則合力對行李箱作功為多少焦耳?
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
有一個1公斤的物體在光滑水平面上做等速度運動,當其移動10公尺時,合力對物體作功為多少焦耳?
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
一顆芒果0.2公斤,由2公尺高的果樹上掉落到地面上,則重力對它作功多少焦耳?(1公斤重=9.8牛頓)
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
某人抱著一個重量為50牛頓的物體,沿水平地面走了2公尺,再垂直舉高4公尺置於一木櫃上。試問此人至少須作功多少焦耳?
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