1130201SC-mid-02
Quiz
•
Science
•
1st - 5th Grade
•
Practice Problem
•
Medium
陳俊明 陳俊明
Used 6+ times
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40 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
鑷子和筷子都是費力的工具，使用時，施力點在支點和抗力點的中間，抗力臂大於施力臂。
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
從槓桿實驗可知，如果抗力大小及抗力點位置不變，且支點位置固定，則施力點距離支點愈遠，達到平衡需要的施力會愈小。
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在日常生活中有許多槓桿工具，例如：筷子和開瓶器，都是應用槓桿原理中抗力臂小於施力臂設計來幫助省力的工具。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
施力於輪上的輪軸裝置，它的施力點到支點的距離會比抗力點到支點的距離近。
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
升旗時，觀察國旗旗桿可以發現，旗桿的頂端有輪子和繩子，當繩子通過滑輪，在下方拉動繩子後，輪子會跟著繩子轉動，可使國旗升上頂端，此處的滑輪是定滑輪。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
轉動門把開門時，因為它是一種施力臂大於抗力臂的滑輪工具，所以使用時可以省力。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
洗衣機是將電能轉換成動能，讓洗衣槽轉動洗衣。
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