Question

1. A mass of 70 kg is suspended from a spring of stiffness 80 N/mm. A dashpot is
fitted to the system and it is found that its amplitude diminishes to 10% of its
initial value after 5 complete oscillations. Find the damping force per unit
velocity and its critical value. Also find the frequency of vibration and compare
it with the frequency of free vibrations.​

Answer 1

Answer:

20%

Explanation:

At release, these forces bring the body to its original ... a spring of stiffness 80 N/mm and a damper with damping ... to 20 % of its initial value in one complete vibration