A mass of 20 kg when suspended from a spring causes a static deflection of 1 cm. Find natural frequency of the system. 1. A spring mass system has spring stiffness of ‘k’ N/m and mass ‘m’ kg. Its...

A mass of 20 kg when suspended from a spring causes a static deflection of 1 cm. Find natural frequency of the system.

1. A spring mass system has spring stiffness of ‘k’ N/m and mass ‘m’ kg. Its natural frequency of vibration is 10 Hz. An extra 4 kg mass is coupled to ‘m’ and the natural frequency reduces by 2 Hz. Determine ‘k’ and ‘m’.