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= 200 Hz
t₁ = 10 s
R = 20 cm = 0,2 m
t₂ = 5 s
vo = ωR
= 2πfR
= 2π.200. 0,2
= 80π
vt = vo + at
0 = 80π + a(10-5)
5a = -80π
a = -16π m/s²
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