vb1-3) The proper period of a mass spring system with a massless spring is 0.285s, 
with the mass hanging on the spring and the spring itself hanging on the ceiling.
 0.7s after the start of the movement, the magnitude of the resulting force on the mass is + 5.88 N.
 At the same time, the deflection of the mass from the equilibrium position is 0.024 m and its speed is -0, 98 m / s,
 where the positive sense of the deflection axis corresponds to the sense in which the spring stretches.

 Determine the vibration function of the mass. 

What is the resulting force at the beginning moment? 

Calculate the acceleration in two ways at the beginning.