Odpowiedzi

2009-11-03T10:56:46+01:00
Moim zdaniem to będzie tak
r = 5m
t = 2min = 120s
n = 12

T = t/n
T = 120/12
T = 10

v = 2πr/T
v = 2*5*π/10
v = 10π/10
v = π