OSCILLATING my brain

i know this problem is posted on this forum somwhere else but i cant quite understand thanks in advance



1. The problem statement, all variables and given/known data



A mass of 0.3 kg is suspended from a spring of stiffness 200 N m–1. If

the mass is displaced by 10 mm from its equilibrium position and

released, for the resulting vibration, calculate:



the maximum velocity of the mass during the vibration



2. Relevant equations



F=kl







3. The attempt at a solution



so far i am thinking that i need to use hookes law as follows so i can get the amplitude

F=k(l+x)



F= mg = 0.3 kg x 9.81 = 2.94 N

k = 200 Nm^-1

l = static spring reflection = 2.94/200 = 0.01

x = displacement due to external force = 10mm



so the amplitude would be l + x = 10.01mm?



do i need to take into account the extra extension when attempting the solution or is it just f/k =l

or do i need to use f/k = l + x to calculate the amplitude





any help would be appriciated



Thanks