
六年级科学 摩擦力
Quiz
•
Science
•
6th Grade
•
Practice Problem
•
Medium
world edu
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 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
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
有关摩擦力的说明,哪些是正确的?
I 和 II
III 和 IV
I, II 和 III
II, III 和 IV
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
火柴一擦就燃,主要原理是 _______.
摩擦力是有能量的推力。.
摩擦是物体产生了热能。
摩擦能磨损物体的表面。
摩擦能阻碍物体的运动。
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
影响摩擦力大小的因素是哪两项?
I 和 II
II 和 III
I 和 III
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪一项不是摩擦力的坏处?
使轮胎磨损。
机械发出噪音。
刹车后车子停下来。
车子引擎发热。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
插图显示玩具车在四个不同粗糙程度的物体上滑行的距离。以下哪一个说明是对的?
物体D表面不会产生摩擦力。
物体C的表面最光滑。
物体B的表面比物体A粗糙。
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
以下哪一种交通工具面对的空气摩擦力最小?
A
B
C
D
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