
物理学问题
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Physics
University

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
在弹性限度内,弹力的大小与形变成正比。( )
正确
错误
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
质量均匀分布的物体的重心位置只与物体的______有关。
质量
形状
体积
密度
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
一个物体的质量为50 kg,重力加速度为9.8 m/s²,该物体受到的重力是多少牛顿?
480 N
450 N
490 N
500 N
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2014年澳大利亚网球公开赛中,我国选手李娜勇夺桂冠,成为该项国际赛事的亚洲第一人,在网球运动中所涉及的物理现象解释正确的是()
A.球拍对网球作用力的施力物体是人
B.网球与球拍撞击时,球拍发生形变是因为球拍比网球受到的力大
C.飞行的网球不受力的作用
D.网球撞击球拍的力和球拍对网球的弹力是一对相互作用力
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
任何物体的重心都位于物体的几何中心。( )
任何物体的重心都位于物体的几何中心。( )
正确
错误
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
已知弹簧原长为10cm,挂上一个2kg的物体后伸长到12cm,弹簧的劲度系数为___N/m。(重力系数为9.8 m/s2)
已知弹簧原长为10cm,挂上一个2kg的物体后伸长到12cm,弹簧的劲度系数为___N/m。(重力系数为9.8 m/s2)
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
在弹性限度内,弹簧的弹力 𝐹 与弹簧伸长的长度 𝑥成正比,其关系可以表示为 𝐹=𝑘𝑥其中 𝑘是弹簧的______。
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