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Y418 杠杆

Authored by KFC Science

Science

5th Grade

Used 2+ times

Y418 杠杆
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22 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

图中杠杆的支点在哪里?

W

X

Y

Z

2.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

图中钓竿中的动力点在哪儿?

A

B

C

D

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

下图显示弟弟在坐跷跷板。如果要将弟弟翘起来,哪里是动力点?

A

B

C

D

4.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

如果图中的工人要用更小的力来挑动大石头,他应该如何做?

将小石头拿掉

将铁棒换成木棒

用一只手来握着铁棒

握着铁棒的末端来出力

5.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

利用方法B来翘桶的盖子会比方法A省力.这是什么原因?

因为动力点离开支点比较远。

因为支点离开阻力点比较近。

因为没有动力点。

因为没有支点。

6.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

要保持重物的平衡,椅子放在哪一个点上最省力?

A

B

C

D

7.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Media Image

插图显示一个学生正要挑起一个箱子。如何能够用更小的力来挑起箱子?

拿掉一半的书本。

把铁棍换成木棍。

让书本尽量靠近箱子。

让书本尽量远离箱子

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