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一个物体受到多个力时，什么条件下，这些力就可以都画在受力物体的重心上，什么条件下就不能移动？ 知乎 Template






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sketch 2813 Stan from South Park by Amer Amimer
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tomski一个物体受到多个力时，什么条件下，这些力就可以都画在受力物体的重心上，什么条件下就不能移动？ 知乎 coloring
view template
一个物体受到多个力时，什么条件下，这些力就可以都画在受力物体的重心上，什么条件下就不能移动？ 知乎 sketch template
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1画出图1海宝所受重力 2画出图2物体受到的支持力和桌面受到的压力3画出图3在光的斜面上物块所受到的力4画出图4电灯所受的力 sketch template
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如图所示叠放在一起的物体A和B在大小为F的恒力作用下沿水平面做匀速直线运动则下列结论中正确的是 A．甲乙两图中A物体所受的擦力大小均 sketch template
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光水平地面上叠放着两个物体A和B如图7所示．水平拉力F作用在物体B上使AB两物体从静止出一起运动．经过时间t撤去拉力F再经过时间 sketch template
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下列关于在斜面上自由下物体的受力分析示意图中正确的是 题目和参考答案——青夏教育精英家教—— sketch template
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在画力的示意图时力的作用点一定要画在 A．施力物体上B．受力物体上C．施力或受力物体都行D．以上说法都不对——青夏教育精英家教—— sketch template
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20．如下图所示物体A重10N物体与竖直墙的动擦因系数为0．4用一个与水平方成37°角的力F作用在物体上要使物体A沿墙作匀速运动则 sketch template
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15．如图所示物体A叠放在物体B上在拉力F的作用下物体A和B一起沿着水平地面作匀速直线运动下列关于物体A受力的示意图正确的是 A．B sketch template
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请画出图中斜面上A物体对斜面的压力的示意图． 题目和参考答案——青夏教育精英家教—— sketch template
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如图所示主要表示力可以改变物体运动状态的是 图主要表示力可以改变物体形状的是 图． 题目和参考答案——青夏教育精英家教—— sketch template
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在下图中画出物体A所受弹力的示意图 百度教育 sketch template
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5．图中表示了力的作用效果其中图 主要表示力能使物体的运动状态生改变图 主要表示力能使物体生形变 均选填 sketch template
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一个物体受多个力作用保持静止 其中一个力从某一时刻开始逐渐减小到零 然后又逐渐增大 直至物体恢复开始时的受力情况 则物体在这一过程中 sketch template
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4．如右图所示在一个斜面上放一个物体要使物体能 匀速沿斜面上动需沿斜面上用拉力F1F1=5N 如右图1所示要使物体能匀速 sketch template
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下列说法正确的是A．擦力是阻力所以它始终是阻碍物体运动的 B．物体不受力时才有惯性 C．站在水平匀速直线行驶的车厢中的人在水平方上 sketch template