六上12 簡單機械和原理
Quiz
•
Life Project
•
7th Grade
•
Practice Problem
•
Easy
G.S. Group
Used 1+ times
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15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
15 mins • 7 pts
滾子的主要功能是什麼?
減少重物的體積
增加重物的重量
減少摩擦力
增加摩擦力
2.
MULTIPLE CHOICE QUESTION
15 mins • 7 pts
斜面的斜度越小,移動物件時所需的力會怎樣?
越小
越大
不變
增加
3.
MULTIPLE CHOICE QUESTION
15 mins • 7 pts
槓桿的支點是什麼?
轉動中心
負荷的位置
重物的位置
施力的位置
4.
MULTIPLE CHOICE QUESTION
15 mins • 7 pts
以下哪一個工具是應用槓桿原理的?
滑輪
剪刀
滾子
斜面
5.
MULTIPLE CHOICE QUESTION
15 mins • 7 pts
定滑輪的主要特點是什麼?
無法改變方向
能省力
能改變施力方向
隨重物移動
6.
MULTIPLE CHOICE QUESTION
15 mins • 7 pts
動滑輪的特點是什麼?
無法改變方向
只能用於小物件
能省力
固定不動
7.
MULTIPLE CHOICE QUESTION
15 mins • 7 pts
齒輪的主要功能是什麼?
減少摩擦力
增加摩擦力
改變機械的運動方向或速度
改變物體的重量
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