Question

1. A small reciprocating machine weighs 50 kg and runs at a constant speed of 6000 rpm.
After it was installed, it was found that the forcing frequency is too close to the natural
frequency of the system. What dynamic vibration absorber should be added if the
nearest natural frequency of the system should be at least 20% from the impressed
frequency​

Answer 1

Answer:

which class is that? 1/2/3/4/5/6/7/8/9/10/