Va rog mult ajutati-ma! E urgent! Multumesc anticipat!

Vectorial:N+G+F+Ff=ma
Ox:F-Ff=ma
Oy:N-mg=0=>N=mg
Ff=uN=umg
F=ma+umg=3•2+0,1•3•10=6+3=9 N
N=mg=3•10=30 N
Vectorial:F'+N+G+Ff=0
Ox:F'-Ff=0=>F'=Ff
Oy:N-mg=0=>N=mg
Ff=uN=umg
F'=umg=0,1•3•10=3 N