Jawabanmu

2014-02-14T22:56:33+07:00
Ep=Ek,
maka Ep = 1/2 m.v^2 cos 30o
Ep= 1/2 2 x 10 x 1/2V3
Ep =5 V3

ket : ^ = pangkat
V = akar,
2 5 2