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HUKUM NEWTON 1.

Hk. I Newton  Hk. kelembaman (inersia) : Untuk benda diam dan GLB   F  0   Fx  0 dan

2.

Hk. II Newton  a  0  GLBB 

 1   2  m1  m2 a  1  T  m1  a

 Fy  0

F  ma

3.

Hukum III Newton  F aksi = - F reaksi Aksi – reaksi tidak mungkin terjadi pada 1 benda

4.

Gaya gesek (fg) : * Gaya gesek statis (fs)  diam  fs = N.s * Gaya gesek kinetik (fk)  bergerak  fk = N. k Arah selalu berlawanan dengan gerak benda/sistem.

N=w . Statika 

N = w – F sin

F  0 :

* *



  0

N = w + Fsin

N = w cos 

 Fx  0  Fy  0 ---o0o---

ΣFx = resultan gaya sumbu x ΣFy = resultan gaya sumbu y ΣF = resultan gaya m = massa a = percepatan N = gaya normal μs= koefisien gesek statis μk= koefisien gesek kinetik W = gaya berat α=sudut yang dibentuk gaya berat setelah diuraikan ke sumbu x atau y

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