ap 力学跟我们高中的力学有什么不同?然后电磁学和高中的什么不同有人回答就给分了.最后五天

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• ap 力学跟我们高中的力学有什么不同?然后电磁学和高中的什么不同有人回答就给分了.最后五天
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• 一道AP 2012 力学题A ring of mass M,radius R,and rotational inertia MR2 is initially sliding on a frictionless surface at constant velocity u0 to the right,as shown above.At time t = 0 it encounters a surface with coefficient of friction μ and begins sliding and rotating.After traveling a distance L,the ring begins rolling without sliding.Express all answers to the following in terms of M,R,u0 ,μ,and fundamental constants,as appropriate.一个质量M,半径R,转动惯量为MR2（平