Question

将单摆A的摆长增加1.5m，振动周期增大到2倍，则A摆摆长为_______m，振动周期等于___________s．

 

Answer 1

【答案】

0.5,1.4

【解析】

试题分析：单摆运动的周期公式

A摆周期

改变后

依题意，

解得，摆长   周期

故答案为0.5,1.4                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  

考点：单摆周期公式的应用

点评：对于单摆的周期与哪些因素有关，可根据单摆的周期公式理解记忆．属于基础题型，应熟练掌握。