A laboratory spring has a force constant of 2.5×105dynecm−1. A mass of 250g is attached to its free end and set into small vertical oscillations.
(i) Convert the given force constant to SI units.
(ii) Calculate the natural angular frequency of oscillation.
(iii) Hence find the linear frequency (in hertz).
(iv) How much time will the mass take to complete 20 full oscillations?