Question

Mi-a dat T1=74N si T2=97,6N deci in concluzie ca acele cabluri o sa reziste. Este oke ?

Answer 1

Vectorial:T₃+G=0

Scalar:T₃=mg=122 N

Vectorial:T₁+T₂=T₃

θ₁+θ₂=90°

Ox:T₁cosθ₁-T₂cosθ₂=0=>T₂=T₁cosθ₁/cosθ₂ (1)

Oy:T₁sinθ₁-T₂sinθ₂-T=0 (2)

Din(1) si(2)=>T₁=mgcosθ₂/sin(θ₁+θ₂)=122*cos53⁰/sin(47°+53°)=122*0,6/1=73,42 N

T₂=mgcosθ₁/sin(θ₁+θ₂)=122*cos47°/sin(47°+53°)=122*0,68/1=83,2 N

T₁<100

T₂<100

=>cablurile rezista