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如图甲所示,轻弹簧竖直固定在水平面上,一质量为m=0.2kg的小球从弹簧上端某高度处自由下落,从它接触弹簧到弹簧压缩至最短的过程中(弹簧始终在弹性限度内),其速度v和弹簧压缩量△x的函数图象如图乙所...
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高三下学期物理《》真题及答案
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在动摩擦因数μ=0.2的水平面上有一个质量为m=1kg的小球小球与水平轻弹簧及与竖直方向成θ=45o
如图所示在水平面上AB两物体的质量分别为2mmAB两物体与水平面的摩擦系数均为μ.A与一劲度系数为
B两物体的质量分别为2m.m,A.B两物体与水平面的摩擦系数均为μ.A与一劲度系数为k轻弹簧相连,弹簧另一端固定在竖直墙上.开始时,弹簧处于自然状态;当B沿水平面向左运动中,当弹簧压缩了x时,A.B之间的相互作用力大小为( )
A.kx﹣2μmg
kx﹣μmg
kx
以上都不对
如图1所示下列振动系统不可看做弹簧振子的是图1
如图甲所示,竖直悬挂的轻弹簧及小铅球组成的系统
如图乙所示,放在光滑斜面上的铁块及轻弹簧组成的系统
如图丙所示,光滑水平面上,两根轻弹簧系住一个小球组成的系统
蹦极运动中的人与弹性绳组成的系统
如图所示一质量为m的光滑弧形槽固定在光滑水平面上弧形槽的高为h一质量为m的物块B.静止放在光滑水平面
如图所示在光滑的水平面上
B.两物体的质量m
A
=2m
B
,A.物体与轻质弹簧相连,弹簧的另一端固定在竖直墙上,开始时,弹簧处于自由状态,当物体
沿水平向左运动,使弹簧压缩到最短时,A.物体给弹簧的作用力的大小为3F,则B.对A.的作用力( ) A.F.B.2F.
3F.
4F.
如图所示将一劲度系数为k的轻弹簧一端固定在内壁光滑的半球形容器底部O′处O为球心弹簧另一端与质量为m
容器相对于水平面有向左的运动趋势
容器和弹簧对小球的作用力的合力竖直向上
轻弹簧对小球的作用力大小为
mg
弹簧原长为R+
如图17所示在动摩擦因数μ=0.2的水平面上有一个质量m=1kg的小球小球左侧连接一水平轻弹簧弹簧左
小球受力个数不变
小球立即向左加速,且加速度的大小为a=8 m/s
2
小球立即向左加速,且加速度的大小为a=10 m/s
2
若剪断的是弹簧,则剪断瞬间小球加速度的大小a=10
m/s
2
如图所示轻弹簧的一端固定在竖直墙上另一端自由伸长质量为2m的光滑弧形槽静止在光滑水平面上底部与水平面
如图1-12所示轻弹簧的一端固定在竖直墙上质量为m的光滑弧形槽静止放在光滑水平面上弧形槽底端与水平面
在下滑过程中,物块的机械能守恒
在下滑过程中,物块和槽的动量守恒
物块被弹簧反弹后,做匀速直线运动
物块被弹簧反弹后,能回到槽高h处
在动摩擦因数μ=0.2的水平面上有一个质量为m=1kg的小球小球与水平轻弹簧及与竖直方向成θ=450
如图所示倾角为θ的光滑斜面ABC放在水平面上劲度系数分别为k1k2的两个轻弹簧沿斜面悬挂着两弹簧之间
如图9-1所示质量为M=3kg的木板静止在光滑水平面上板的右端放一质量为m=1kg的小铁块现给铁块一
水平面上有一个质量为m=2kg的小球小球与水平轻弹簧及与竖直方向成θ=45°角的不可伸长的轻绳一端相
此时轻弹簧的弹力大小为20N.
小球的加速度大小为8 m/s
2
,方向向左
若剪断弹簧,则剪断的瞬间小球的加速度大小为10 m/s
2
,方向向右
若剪断弹簧,则剪断的瞬间小球的加速度为0
如图所示将一劲度系数为k的轻弹簧一端固定在内壁光滑的半球形容器底部处O.为球心弹簧另一端与质量为m的
容器相对于水平面有向左的运动趋势
容器对小球的作用力竖直向上
轻弹簧对小球的作用力大小为
弹簧原长为
如图所示在光滑水平面上用两根劲度系数分别为k1k2的轻弹簧系住一个质量为m的小球开始时两弹簧均处于原
如图所示将一劲度系数为k的轻弹簧一端固定在内壁光滑的半球形容器底部处O.为球心弹簧另一端与质量为m的
)容器相对于水平面有向左的运动趋势 (
)容器对小球的作用力竖直向上 (
)弹簧原长为(
) (
)轻弹簧对小球的作用力大小为
如图所示平放在水平面上的轻质弹簧的一端固定在竖直墙上质量为m1的光滑弧形槽静止在光滑水平面上底部与水
如图所示将一劲度系数为k的轻弹簧一端固定在内壁光滑的半球形容器底部O.′处O.为球心弹簧另一端与质量
容器相对于水平面有向左的运动趋势
容器和弹簧对小球的作用力的合力竖直向上
轻弹簧对小球的作用力大小为
mg
弹簧原长为R.+
如图所示轻弹簧的一端固定在竖直墙上质量为m的光滑弧形槽静止放在光滑水平面上弧形槽底端与水平面相切一个
在下滑过程中,物块的机械能守恒
在下滑过程中,物块和槽的动量守恒
物块被弹簧反弹后,做匀速直线运动
物块被弹簧反弹后,能回到槽高h处
如图所示物体P.放在粗糙的水平地面上劲度系数为k=250N/m的轻弹簧左端固定在竖直墙壁上右端固定在
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