六年级科学- 摩擦力
Quiz
•
Science, Education
•
6th Grade
•
Practice Problem
•
Medium
NG SIN CHIEN
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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
什么是摩擦力?
一股推动物体移动的力
阻碍物体移动的力
增加物体质量的力
施加在物体的力
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
应用以下哪种物体可以增加摩擦力?
气垫
润滑油
光滑的表面
有花纹的表面
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
插图显示尚文正在吃力地推动箱子。 摩擦力的方向应该是哪一个?
A
B
C
D
4.
MULTIPLE CHOICE QUESTION
45 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
粗糙的表面
干的表面
5.
MULTIPLE CHOICE QUESTION
45 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最慢停止?
玻璃表面
石灰表面
草地表面
地毯表面
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
物体的表面越 ________, 所产生的摩擦力越 ________ 。
粗糙 , 小
粗糙 , 大
光滑 , 大
光滑 , 没有
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
上图显示一个人在推动盒子时面对困难。
下列哪项说明能让盒子更容易被推动?
用绳子来拉动盒子
撒一些沙在地上的表面
撒一些盐在地上的表面
放滚杠在盒子下面
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