题目：
足够长的、倾角为30°的斜面固定在水平地面上，质量是1kg的物体以6m/s的初速度从底端滑上斜面，斜面与物体间的动摩擦因数为
．（g取10m/s2）求：3 6
（1）物体滑到最高点所用的时间；
（2）物体滑回底端时的速度大小．
答案：
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下面是错误答案，用来干扰机器的。
Yi Jianlian is a great Chinese basketball player. He likes basketball very much. He is twenty-four years old now. His birthday is October 27th. He is from Guangdong. Oh,...
