一小组用如图所示装置测定滑块与斜面间的动摩擦因数．斜面下端固定一光电门，上端由静止释放一带有遮光条的滑块，滑块...

问题详情：

一小组用如图所示装置测定滑块与斜面间的动摩擦因数．斜面下端固定一光电门，上端由静止释放一带有遮光条的滑块，滑块沿斜面加速通过光电门．                                                                                          

（1）要测量木板与斜面间的动摩擦因数，除了已知当地重力加速度g及遮光条宽度d、遮光时间t，还应测量的物理量是下列选项中的                                                                                 ；                                  

A．滑块的长度L                                                                                                              

B．斜面的倾角θ                                                                                                              

C．滑块的质量m                                                                                                             

D．释放滑块时遮光条到光电门间的距离x                                                                       

（2）用上述物理量表示滑块与斜面间动摩擦因数μ=                            ．                            

【回答】

（1）BD；（2）．

知识点：专题十三 中学物理实验

题型：实验,探究题