hey everybody:(adsbygoogle = window.adsbygoogle || []).push({});

here is my problem

A uniform, aluminum beam 9.00 m long, weighting 300 N,

rests symmetrically on two supports 5.00 m apart. A boy

weighing 600 N starts at point A and walks toward the right.

How far beyond point B can the boy walk before the beam tips?

it will be like this right?

my questions is what am i going to use as a point ofCode (Text):

boy

|-----*----------*-----|

A B

reference,do i use B? how cna i calculate the distances?

I always get confused when plugging in distance for

the formula

D_cm = (m1x1+m2x2+..) / (m1+m2+..)

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