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最近在讲高中物理选修3-5,我们在学习过程中遇到了这样一道题。(2014·安徽卷·24)在光滑水平地面上有一凹槽A,中央放一小物块B。物块与左右两边槽壁的距离如下图所示,L为1.0 m,凹槽与物块的质量均为m,两者之间的动摩擦因数滋为0.05。开始时物块静止,凹槽以v0=5 m/s初速度向右运动,设物块与凹槽槽壁碰撞过程中没有能量损失,且碰撞时间不计。g取10 m/s2。求:
In recent high school physics elective 3-5, we encountered such a problem in the learning process. (2014 · Anhui Province · 24) There is a groove A on the smooth horizontal ground and a small block B in the center. The distance between the block and the left and right side walls is shown in the following figure. L is 1.0 m, the mass of the groove and the block is m, and the dynamic friction coefficient between the two is 0.05. At the beginning of the block is still, the groove to v0 = 5 m / s initial velocity to the right movement, set the block and the groove wall collision process without energy loss, and the collision time is not counted. g take 10 m / s2. begging: