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EK => 1/2(MV^2)
EK => I/2( 20 kg x 6 x 6)
EK => 1/2 x 720
EK => 360 J
v: 6m/s
D2 : EK
D3 : EK=1/2 m×v kuadrat
20 ×6 kuadrat
20 ×36
EK=720÷2
EK=360 J