y3滑轮
Authored by liew kfang
Science
3rd Grade
Used 12+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
是一个有凹槽的轮子，边缘绕绳子或链条的简单机械。
滑轮
齿轮
杠杆
螺旋
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
图中是什么简单机械？
轮轴
齿轮
轮子
滑轮
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
图中是哪一类滑轮？
动滑轮
定滑轮
滑轮组
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
下面哪一个是动滑轮？
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
利用上图简单机械提升重物时， 需要向什么方向用力？
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
什么是滑轮？
轮子周缘有槽, 能套上绳子
边缘有齿状的轮子
两个半径不同，绕着同一个轴心转动的工具
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
滑轮有何功用？
使物体移动、上升或下降
改变物体移动的方向
使机械移动
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