Question

將單擺A的擺長增加1.5m，振動周期增大到2倍，則A擺擺長為_______m，振動周期等于___________s．

 

Answer 1

【答案】

0.5,1.4

【解析】

試題分析：單擺運動的周期公式

A擺周期

改變后

依題意，

解得，擺長   周期

故答案為0.5,1.4                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

考點：單擺周期公式的應(yīng)用

點評：對于單擺的周期與哪些因素有關(guān)，可根據(jù)單擺的周期公式理解記憶．屬于基礎(chǔ)題型，應(yīng)熟練掌握。