
2-2~2-4Science
Authored by 陳耀民 老師
Science
1st - 5th Grade
Used 1+ times

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50 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
兩個互相扣住的齒輪,一個齒輪轉動的方向如果是順時針,另一個齒輪轉動的方向會是逆時針。
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
大、小兩個齒輪相扣,齒數分別是 20 齒和 10 齒,大齒輪轉動一圈,小齒輪會轉動半圈。
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
定滑輪的軸心相當於槓桿的支點,滑輪的半徑是施力臂也是抗力臂,所以不省力也不費力。
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
輪軸原理中,「施力於輪」表示施力臂比抗力臂長,所以省力。
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
由大、小齒輪組成的齒輪組中,大齒輪轉動的圈數會比小齒輪的多。
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
應用流體傳送動力的機械其主要的目的除了傳送動力之外,還可以省力。
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
使用定滑輪搬運重物,可以省約一半的力。
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