國中自然3上_2-2
Quiz
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Fun
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7th - 9th Grade
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Practice Problem
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Hard
Tang Da
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
如附圖所示,小玉在光滑水平桌面上,利用一組質量相同的砝碼及滑車一臺,操作「不同拉力下,物體質量不變,產生不同加速度」的實驗,下列操作方法何者正確?
秤盤上的砝碼數不變,僅須改變滑車上的砝碼數
滑車上的砝碼數不變,僅須改變秤盤上的砝碼數
滑車與秤盤上的砝碼總數不變
滑車與秤盤上的砝碼數須同時等量增加或減少
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
質量80kg的物體在做直線運動,其初速度大小為10m/s,經固定之摩擦力作用,4秒後物體停止不動,則此摩擦力大小為多少牛頓?
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
小偉以30牛頓的力推動一部裝滿水、總質量50公斤的推車,若推車的水逐漸流失,總質量剩下30公斤時才發現,則在推動之初,其加速度大小為多少m/s2?剩下30公斤時,加速度大小又為多少m/s2?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知1公斤重等於9.8牛頓,有一物體重為4.9牛頓,靜置於光滑無摩擦之水平桌面上,受1公斤重之水平方向外力作用,則其加速度為多少m/s2?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知外太空中無重力,在一太空船內的太空人以10牛頓的力推動質量50公斤的鐵球,求此鐵球的加速度大小為多少m/s2?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在光滑水平面上,有一質量40公斤的臺車,受到800牛頓的水平推力作用,則該臺車所獲得的加速度為多少m/s2?
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
有一個質量5公斤的物體,受到一個8公斤重的作用力垂直向上拉舉,試問此物體所產生的加速度大小為多少m/s2?(1kgw=10N)
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