Odpowiedzi

2010-02-24T19:15:22+01:00
V=2πr/T
r = 40cm = 0,4m
T = 130/min = 2,16/sek
π=3,14
v = 2π*0,4/2,16 = 0,8π/2,16 = 2,51/2,16 = 1,162m/s