Dekartov kordinatni sistem x=x ( t) y=y ( t) V = √ ˙ x 2 +˙ y 2 a= √ ¨ x 2 +¨ y 2 Polarni kordinatni sistem r=r ( t ) φ=φ ( t) V = √ Vr 2 + Vφ 2 a= √ ar 2 +aφ 2 Vr =˙ r a r =¨ r−r ˙ φ 2 Vφ =r ˙ φ a φ =r ¨ φ +2 ˙ r ˙ φ Prirodni koridnatni sistem s=s ( t) V = ds dt τ 0 a= dV dt = d 2 s dt 2 τ 0 + ds dt d τ 0 dt a= √ a τ 2 +a n 2 + a b 2 a b =0 a n = V 2 Rk a τ = dv dt
