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可加6年级科学-力

Authored by honping leow

Science

6th Grade

Used 4+ times

可加6年级科学-力
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12 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

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

Media Image

攀岩运动员使用镁粉主要是要 ________.

增加手掌的摩擦力

保护双手不受伤

减少摩擦力

让双手保持凉爽

3.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

以下哪一项 ‘是’ 摩擦力的坏处?(答案可超过一个)

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。

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

运动员的头盔有什么作用?

I 保护头部。

II 减少空气的阻力。

III 减少选手与空气产生的摩擦力。

I 和 II

II 和 III

III 而已

全部都是

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

什么是力?

What is the meaning of force?

拉力施加在物体上

The pulling effect of an object

推力施加在物体上

The pushing effect of an object

推力和拉力施加在物体上

The pulling and pushing effect of an object

物体的移动而产生一种力量

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

上图显示一个男人正在进行活动。

Diagram above shows a man carrying out an activity.

什么力涉及这个活动?

What is the force involved in this activity?

推力 Pulling force

拉力 Pushing force

地心引力 Gravity force

压缩力 Compressing force

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

下列哪项活动显示力能改变物体的形状?

Which of the following shows that a force can change the shape of an object?

Media Image
Media Image
Media Image
Media Image

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