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ditanya : EK?
Jawab : EK = 1/2 x m x V^2
= 1/2 x 4 x 8^2
= 1/2 x 4 x 64
= 128 Joule
EK = 1/2 x 4 x 8^2
EK = 2 x 64
EK = 128
Jadi energi kinetik sama dengan 128 Newton