Jawabanmu

2014-05-28T12:58:05+07:00
Ek= 1/2×m×v²
    = 1/2×0,05×100²
     =250 joule

2014-05-28T12:58:46+07:00
Rumus 1/2m.vkuadrat
1/2 0,05 kg x100kuadrat
0,1x 10000
energi kinetik = 1000 Joule