Jawabanmu

2014-06-12T08:31:08+07:00
Ek = 1/2 . m .v^2
Ek = 1/2 . 4 . 10^2
Ek = 1/2 . 4. 100
Ek = 200
2014-06-12T08:33:26+07:00
Ekrot = 1/2 IW^2
=1/2 1/2 mr^2w^2
=1/4mv^2
=1/4 4 10^2
=100
Ektrans=1/2 mv^2
=1/2 4 10^2
=200
Ektotal=100+200=300
Ek tot = 7/10.m.v^2
Ek tot = 7/10.4.100
= 280
kan silindir pejal bang,