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dit: α=?
*cari ω dahulu:
ω=dθ/dt
ω=d 1/2t²+4t+10/dt
ω=t+4 rad/s ----?1/2t²=1/2.2t=t---->pangkat jadi kali
*baru cari α
α=dω/dt
α=d t+4/dt
α=1 rad/s²--->t¹=1