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T=1/0,4
T=2,5 s
b) 60*0,4=24
c) 32*T=32*2,5 s=80 s
d) a=V^2/r
r-2 m
Obw. - 2r
Obw=2*3,14*2=12,56m
V=f*Obw=0,4 Hz*12,56m=5,024m/s
a=(5,024m/s)^2 /2=12,62 m/2^2