Question

aflati formula lui m T=2π√m/k​

Answer 1

$T=2\pi\sqrt{\frac{m}{k}} \\ \Rightarrow \sqrt{\frac{m}{k}}=\frac{T}{2\pi} \\ \Rightarrow \frac{m}{k}=(\frac{T}{2\pi})^2=\frac{T^2}{4\pi^2} \\ \Rightarrow \boxed{m=\frac{kT^2}{4\pi^2}}$