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1/2mvkuadrat : 1/2mvkuadrat
ek 1 = 1/2x2x1kuadrat
1 =1
ek2= 1/2mvkuadrat
8 = 1/2 x 1 x vkuadrat
8 x 2 =v kuadrat
akar 16 = v
4 = v