A vertical helical spring has a stiffness of 2 kN/m; calculate the frequency of the oscillation that will be produced when a mass of 3 kg is supported by the spring. A 2.5 kg mass when attached to the...

A vertical helical spring has a stiffness of 2 kN/m; calculate the frequency of the oscillation that will be produced when a mass of 3 kg is supported by the spring.

A 2.5 kg mass when attached to the lower end of a vertical helical spring causes it to extend by 20 mm. What will the frequency of oscillation of the system be?