Răspuns :
sinα=h/l⇒sinα=1/2⇒α=30
se descompune G dupa doua directii perpendiculare in componentele
Gn=Gcosα
Gt=Gsinα
Ox ⇒F-Gt-Ff=o⇒Ff=F-Gt=F-Gsin α=60-100/2=10 N
se descompune G dupa doua directii perpendiculare in componentele
Gn=Gcosα
Gt=Gsinα
Ox ⇒F-Gt-Ff=o⇒Ff=F-Gt=F-Gsin α=60-100/2=10 N