4. A symmetric body moves without the influence of forces or torques. Let x, be the symmetric axis of the body and the angular momentum L be along x;. The angle between the angular velocity o and x, is a. Let and ī initially be in the x, - x; plane. What is the angular velocity of the symmetric axis about L in terms I1, I3, m, and a?

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Forced undamped vibrations

In mechanical engineering, vibration is expressed as the term that occurs due to an object's backward and forward movement about a point of equilibrium. Generally, there are three types of vibrations which are,