No, you made an algebraic error.
T= 2 pi sqrt(m/k) is the period of a spring-mass oscillating system.
T^2 = 4 pi^2 m/k
k = 4 pi^2 m /T^2
need help rearanging this formula
T= 2pie sqrt(m/k solve for k
is this right
k= T^2/m 4pie^2
1 answer