Jawabanmu

2013-12-17T14:26:14+07:00
Energi Kinetik = 1/2 . m . V kuadrat = 1/2 x 10kg x 20m/s kuadrat
                                                    = 1/2 x 10kg x 400m/s = 5 x 400 = 2000 joule
2013-12-17T14:33:06+07:00
Diket = v = 20 m/s
          m = 10 kg
ditanya = EK
jawab =
EK = 1/2 mv v^{2}
      = 1/2 . 10.  20^{2}
      = 5.400
      = 2000 J