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例1.(2014年安徽高考第24题)在光滑水平面上有凹槽A,中央放一小物块B.物块与左右两边槽壁的距离如图1所示,L为1.0m,凹槽与物块的质量均为m,两者之间的动摩擦因数μ为0.05.开始时物块静止,凹槽以v_0=5m/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10m/s~2.求:(1)物块与凹槽相对静止时的共同速度;(2)从凹槽开始运动到两者相对静止物块与
Example 1. (2014 Anhui entrance exam 24) in a smooth horizontal surface with a groove A, put a small block in the center B. The block and left and right sides of the groove wall distance shown in Figure 1, L is 1.0m, groove And the mass of the block are m, the dynamic friction coefficient μ between the two is 0.05.Start the block stationary, the groove to v_0 = 5m / s initial velocity to the right, set the block and the groove wall collision process In the absence of energy loss, and the collision time is not counted, g take 10m / s ~ 2. Seeking: (1) block and groove relative static when the common speed; (2) from the groove began to move the two relatively static block versus