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m = 4 kg
Vo = 0 m/s
a = 3 m/s
t = 2 s
Ditanyakn : W yg diubah menjadi neergi kinetik ?
Dijawab :
Jarak perpindahan :
St = Voxt + 1/2 x a x t²
= 0x2 + 1/2 x 3 x 2²
= 0 + 6
= 6 m
Jadi Usaha :
W = F x S
= (mxa) x S
= (4x3) x 6
= 12 x 6
= 72 J