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KINEMATIKA GR

ωo = 0
α = 15 rad/s²
t = 0,4 s
r = 10 cm = 0,1 m
aT = ___?

kecepatan sudut saat t
ω = ωo + α t
ω = 0 + 15 • 0,4
ω = 6 rad/s

percepatan sentripetal
as = ω² r
as = 6² • 0,1
as = 3,6 m/s²

percepatan tangensial
at = α r
at = 15 • 0,1
at = 1,5 m/s²

percepatan total
aT = √(as² + at²)
aT = √(3,6² + 1,5²)
aT = 3,9 m/s² ← jwb

atau
aT = r √(ω⁴ + α²)
aT = 0,1 √(6⁴ + 15²)
aT = 3,9 m/s² ←


catatan
5, 12, 13 merupakan tripel Pythagoras