六年级第12课机械(二)
Quiz
•
Science
•
1st Grade
•
Practice Problem
•
Hard
cheng chounyae
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10 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
请选出能省力的杠杆
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
如果要让这个杠杆保持平衡,可以怎么做?
把橡皮擦往左移
把橡皮擦往右移
把笔往左移
把笔往右移
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
這是一個門把,請選出關於它正確的選項。
A是輪、B是軸,它是一個可以省力的輪軸。
A是軸、B是輪,它是一個可以省力的輪軸。
A是輪、B是軸,它是一個不能省力的輪軸。
A是軸、B是輪,它是一個不能省力的輪軸。
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
阿忠使用一個定滑輪拉起10公斤的物體,請選出所有正確的描述。
這種滑輪可以改變施力方向。
這種滑輪可以省力。
如果阿忠要把重物往上提10公分,他需要把繩子往下拉10公分。
這種滑輪會費力。
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
阿樺使用這個滑輪組提起重物,請選出所有正確的選項。
A是定滑輪、B是動滑輪。
動滑輪可以改變施力方向。
動滑輪可以省力,但費時。
這整個滑輪組,讓阿樺可以省力,也可以改變施力方向。
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
這是腳踏車使用的齒輪、鍊條與車輪組,請選出所有正確的選項。(前齒輪有40齒、後齒輪有20齒)
前齒輪向前轉的話,後齒輪會向後轉。
前齒輪轉1圈的時間,後齒輪可以轉2圈。
前輪部分是腳踏板帶動前齒輪轉動,是「輪」帶動「軸」。
後輪部分是後輪帶動後齒輪轉動,是「輪」帶動「軸」。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪一種工具不屬於槓桿原理的應用?
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