Jawabanmu

2013-12-12T15:30:24+07:00
M = 0,2 kg
g = 10 m/s
Ek maks = 40 J
 Ek=   \frac{1}{2} mv ^{2}
40 =  \frac{1}{2} 0,2.v ^{2}
40 = 0,1 . v ^{2}
 v ^{2}  \frac{40}{0,1}
         = 400
      v =   \sqrt{400}
        = 20 m/s
Ek = Ep
40 = m.g.h
40 = (0,2)(10)h
h  =  \frac{40}{(0,2)(10)}
   =   \frac{40}{2}
   = 20 m

2013-12-12T15:50:06+07:00
Ek= 1/2 . m .  v^{2}
40 = 1/2 . 0,2 .  v^{2}
v^{2} =  \frac{40}{1/2 . 0,2}
 v^{2} = 400
v = \sqrt{400}
v = 20

h maxsimal =  \frac{v^{2} }{2.g}
h maxsimal =  \frac{20^{2} }{2 . 10}
h maxsimal = \frac{400}{20}
h maxsimal = 20

jadi tinggi maxsima yg dapat di capai adalah 20 meter