试题与答案

在校运会中,小翔参加了铅球比赛。如果他用200N的力,将重50N的铅球投到了10

题型:选择题

题目:

在校运会中,小翔参加了铅球比赛。如果他用200N的力,将重50N的铅球投到了10m远处。则下列关于他投球时做功情况的说法中,正确的是(  )

A.做功2000J 

B.做功500J

C.没有做功

D.条件不足,无法计算

答案:

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