一轻绳长为l,系着一质量为m的小球,在光滑水平面上做匀速圆周运

一轻绳长为l,系着一质量为m的小球,在光滑水平面上做匀速圆周运动,小球运动的线速度为v,求:

    (1)小球运动的周期;

    (2)在小球运动半圈的时间内重力对小球冲量的大小;

    (3)在小球运动半圈的时间内绳的拉力对小球冲量的大小。

 

答案

(1)        (2)     (3)


解析:

(1)小球运动的周期 

    (2)在小球运动半圈的时间内重力对小球冲量的大小

   

    (3)在小球运动半圈的时间内绳的拉力对小球冲量的大小

   

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