
六年级 科学 单元6 摩擦力
Authored by PU Moe
Science
6th Grade
Used 498+ times

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19 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
什么是摩擦力?
一种涉及阻碍物体的移动的力
一种涉及改变物体的力
一种当两个物体的表面互相接触时所产生的阻碍物体移动的力
施加在物体上推力和拉力
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
下列哪项是说明摩擦力的例子?
铝罐被挤压后而变成扁铝罐
被压时改变形状的气球
一个在草地上很难被拉着移动的盒子
一个被踢时而改变移动的方向的球
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
实验里, 一辆玩具车在不同的表面上行走。
哪一种表面能使玩具车停止得最慢?
玻璃表面
沙地表面
草地表面
地毯表面
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项不是影响摩擦力的因素?
物体的形状
物体的质量
物体表面的面积
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
哪项活动显示摩擦力的益处?
鞋子底部的纹路磨损
磨刀让刀更尖利
使物体难以移动
笔尖变钝
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
图上显示工人在推盒子而面对的困难。
下列哪项说明是推动盒子最容易的方法?
用绳子来拉动盒子
撒一些沙在地上
撒一些盐在地上
放滚杠在盒子下面
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
上图显示门的合页
下列哪项可以帮助的合页减少摩擦力?
水
轮子
润滑油
爽身粉
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