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2014-04-27T21:25:29+07:00
Diket : m=400gr=0,4kg v=72km/jam=20m/s jwb : Ek=1/2.m.v"2 =1/2.0,4.400=20j keterangan v"2= kecepatan kuadrat
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2014-04-27T21:26:42+07:00
M=400 gram=0,4 kg
v=72km/jam= 72000m/3600s=20m/s
EK=1/2.M.V²
     =1/2.0,4.20²=80 joule