
第五章-力和压强
Authored by 纤淞 黄
Science
7th - 9th Grade
Used 29+ times

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12 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
实验室常用到的测力计是___________。
量筒
弹簧
托盘天平
三杆天平
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
以下是我们生活常见的几种现象。这些现象中,物体因为受力而改变运动状态的是:
用力握小球,球变瘪了
篮球撞击在篮板上被弹回
用力揉面团,面团形状发生了变化
一阵风把地面的灰尘吹得漫天飞舞
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
关于胡克定律中伸长量指的是___________。
弹簧的原长
弹簧伸长后的总长度
弹簧压缩后的总长度
弹簧变化(伸长或压缩)的长度
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
关于重力,下列说法错误的是______________。
重力的方向永远竖直向下
地球表面的不同位置,重力往往也不相同
重力是由地球对物体的吸引力而产生的
重的物体受到重力,轻的物体没有受到重力
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
关于质量与重量,下列说法正确的是____________。
在不同的星球,质量和重量都会改变
在不同的星球,重量会改变而质量不会改变
在不同的星球,质量会改变而重量不会改变
无论在何处,质量换算成重量都需要乘上9.8N/kg
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
下列关于摩檫力的说法中,不正确的是____________。
物体越轻摩檫力一定越大
摩檫力总是阻碍物体的运动
摩擦力的方向总是与物体运动方向相反
没有摩檫力,我们就不能在地面上行走
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
通常鞋底都刻有很多花纹,主要是为了_______________。
增大压力
增大弹力
增大压强
增大摩檫力
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