KINEMATIKA merupakan Ilmu gerak yang membicarakan gerak suatu benda tanpa memandang gaya yang bekerja pada benda tersebut (massa benda diabaikan). Jadi jarak yang ditempuh benda selama geraknya hanya ditentukan oleh kecepatan v dan atau percepatan a.
Gerak Lurus Beraturan (GLB) adalah gerak lurus pada arah mendatar dengan kocepatan v tetap (percepatan a = 0), sehingga jarakyang ditempuh S hanyaditentukan oleh kecepatan yang tetap dalam waktu tertentu.
Pada umumaya GLB didasari oleh Hukum Newton I ( S F = 0 ).
S = X = v . t ; a = Dv/Dt = dv/dt = 0 |
v = DS/Dt = ds/dt = tetap |
Tanda D (selisih) menyatakan nilai rata-rata.
Tanda d (diferensial) menyatakan nilai sesaat.
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