Aflii perioadaa T=2*π*√l/g
Aflii cate oscilatii a facut in t=20s
n=t/T
In timp de o oscilatie parcurge de 4 ori amplitudinea A deci
S=n*4*A
S=4*A*t/T de unde scoti amplitudinea A
A=T*S/4*t=(2*π*√l/g)*S/4*t
l=90cm=0,9m; S=5m; t=20s; g=10N/kg.
Obtii A in metri
Spor!
