Jawabanmu

2014-02-09T13:22:32+07:00
Dik : m = 30 kg; Ek = 60 J
Dit : v?
Penye :
Ek = 1/2 mvˆ2
60 = 1/2 x 30 x v
ˆ2
60 = 15 x v
ˆ2
60/15 = v
ˆ2
4 = v
ˆ2
√4= v
2= v
Jadi v = 2


2014-02-09T14:52:33+07:00
Ek=1/2.m.v2 60 j = 1/2.30.v2 60 j =15.v2 v2. = 60/15 v2 =4 v. =√4 v = 2