選修物理I-2-4~3-2

Quiz
•
Physics
•
11th Grade
•
Medium
來加 以
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5 questions
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1.
MULTIPLE CHOICE QUESTION
10 mins • 1 pt
一石子P由頂樓靜止自由下落距離a後,另一個石子Q開始由頂樓下方距離b處靜止下落。若兩石子同時著地,則頂樓的高度為何?
(a+b)/4
(a+b)²/4a
(a+b)²/2a
√[ab/(a+b)]
√[(a+b)/(2ab)]
2.
MULTIPLE SELECT QUESTION
10 mins • 1 pt
如圖中雙線道的公路上,各有甲、乙兩車前後相距S,它們同時同向運動,乙在前面作初速為零、加速度量值為a₂(方向向右)的等加速運動。甲在後面作初速為v₀、加速度量值為a₁(方向向右)的等加速運動,則下列敘述哪些正確(應選4項)?
若a₁ = a₂,甲、乙兩物體相遇一次
若a₁ < a₂,甲、乙兩物體可能不相遇
若a₁ < a₂,甲、乙兩物體可能相遇一次
若a₁ < a₂,甲、乙兩物體可能相遇兩次
若a₁ > a₂,甲、乙兩物體可能不相遇
3.
FILL IN THE BLANK QUESTION
10 mins • 1 pt
在A+B=C的向量和中,向量A的大小為12,逆時針方向和 + x軸夾角37°;向量C的大小為20,方向指向 + y軸,則向量B的大小為何?
4.
MULTIPLE SELECT QUESTION
10 mins • 1 pt
有一質點在平面上運動,其位置r(m)對時間t(s)的關係為r = 2t² i + 3t j,則有關該質點於第1s末(t = 1s)的運動狀態,下列哪些正確(應選3項)?
速度為2 i + 3 j m/s
運動方向與 + x方向夾角約53°
切向加速度之量值為3.2m/s²
法向加速度之量值為2.4m/s²
運動軌跡方程式為x = 2(y/3)²
5.
MULTIPLE SELECT QUESTION
10 mins • 1 pt
下列敘述哪些正確(應選2項)?
若加速度和速度夾角θ,則當0° < θ < 90°時速率變大,方向不變
斜拋物體達最高點時加速度為零,速度亦為零
一物體自靜止作等加速運動,其軌跡必為直線
一物體之切、法向加速度時刻在變,則必不為等加速運動
作等加速度運動的斜向拋射,在空中任一秒的時距內,速度變化量均相同
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