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九上自然3.1功與功率

Authored by 胡綱顯 胡綱顯

Physics

9th Grade

九上自然3.1功與功率
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5 questions

Show all answers

1.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

那些是功的單位?

焦耳(J)

牛頓.公尺(N.m)

公斤(kg)

公尺(m)

瓦特(W)

2.

MULTIPLE SELECT QUESTION

3 mins • 1 pt

那些情況沒有作功(W=0)?

物體沒有受力(F=0)

物體有受力,但沒有位移(S=0)

作用力與位移方向垂直

作用力與位移方向相同

作用力與位移方向相同相反

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

何者作正功(W>0?

作用力與位移方向垂直

作用力與位移方向相同

作用力與位移方向相反

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

何者作負功(W<0)?

作用力與位移方向垂直

作用力與位移方向相同

作用力與位移方向相反

5.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

哪些是功率的單位?

瓦特(W)

千瓦(kW)

焦耳(J)

焦耳/秒

(J/s)

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