Question

Mă poate ajuta cineva?

Answer 1

sinα=h/l=5/10=1/2=>α=30°

Vectorial:F+N+Ff+G=ma

Scalar:Ox:F-mgsinα=ma

         Oy:N-mgcosα=0=>N=mgcosα

Ff=μN=μmgcosα=>μ=Ff/mgcosα=10/(2*10cos30°)=1/1,73=0,57

F-mgsinα=ma<=>a=(F-mgsinα)/m=(50-2*10*sin30°)/2=40/2=20 m/s²