Jawabanmu

2014-05-31T15:59:07+07:00
Ek=1/2 x m x v
= 1/2 x 2x 3
=3 joule
2014-05-31T16:01:07+07:00
Ek = 1/2 m . v²
= 1/2 2 . 3²
= 1/2 2. 9
= 1/2 18
= 9