Jawabanmu

2014-05-14T08:50:02+07:00
A = F cos alpha
   =10 cos 60
   = 10 x 1/2
   = 5 m/s
2014-05-14T09:23:08+07:00
A = F . cos α
   = 10 . cos 60
   = 10 x 1/2
   = 5 m/s

semoga membantu :)