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ma=Fn1
2) Fw=Fn2-Fn1
ma=Fn2-ma
3) Fw=Fg-Fn2
ma=mg-Fn2
3ma= Fn1+Fn2-Fn1+Fg3-Fn2
3ma=Fg
a=mg:3m
a=g:3
a=9,81:3=ok.3,3 :)
Odp.A