试题与答案

小林同学用一杆秤称一实心球的质量,如图所示.当杆秤在水平位置平衡时,秤砣拉线正好

题型:选择题

题目:

小林同学用一杆秤称一实心球的质量,如图所示.当杆秤在水平位置平衡时,秤砣拉线正好压在4kg的刻度线上.根据秤砣的拉线、提纽和称钩所在秤杆的位置之间的距离的粗略关系,可以估测出秤砣的质量大约是(  )

A.10g

B.400g

C.1000g

D.4000g

答案:

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