如图所示,一根轻绳上端固定在O点,下端拴一个重为G的钢球,球处

如图所示,一根轻绳上端固定在O点,下端拴一个重为G的钢球,球处于静止状态。现对球施加一方向始终保持水平的外力F,使球缓慢的移动,在移动过程中的每一时刻均可以认为球处于平衡状态。如果轻绳可以承受拉力T的最大值为2G,设绳与竖直方向的夹角为θ

      求:(1)外力F的取值范围。

      2)在F-tanθ坐标系中画出外力Ftanθ的关系图象。

 

 


     

答案

1

     2

 


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