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Cel mai inteligent răspuns!
2014-10-09T15:45:32+03:00
Elongatia = y= A/2 => y=0,4m
v= pulsatia*A*cos(pulsatia*t+faza initiala)
De asemenea y = A*sin(pulsatia*t+faza initiala)= 0,8*sin(pi/8*t+pi/8).
=> A=0,8m, pulsatia= pi/8, faza initiala=pi/8.
=> v=pi/8*0,8*cos(pi/8*t+pi/8)
pi=3,14
=> v= 0,314*cos(pi/8*t+pi/8)  m/s





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