Answer:
Angular frequency,

Step-by-step explanation:
Given that,
Amplitude of simple harmonic motion, A = 2.3 m
Maximum velocity of the object,

To find,
The object's angular frequency.
Solution,
The equation of the displacement of particle is given by :

On differentiating above equation, we get the expression for maximum velocity as :




So, the angular frequency of the object is 6.52 rad/s.