Jawabanmu

2014-09-12T20:33:28+07:00
Percepatan = ( t + 3 ) . (t+3)
                 = t² + 6t + 9 rad/s²
kecepatan = integral percepatan
                = 1/3 t³ + 3 t² + 9t
t = 2 s
= 1/3 . (2)³ + 3 (2)² + 9 . 2
=1/3 . 8 + 3.4 + 18
=8/3 + 12 + 18
= 8/3 + 30
= 98/3 rad /s ~~hasilnya