A 200 Kg Mass Is Attached to the End of a a 1.00

Multiple Choice

A 20.0 kg mass is attached to the end of a 1.00 m steel rod with a 1.00 mm diameter.If the tensile modulus of steel is 20.0 $\times$ 10¹⁰ N/m²,then the frequency of the simple harmonic motion of the mass is

A) 37.2 Hz.
B) 30.4 Hz.
C) 24.5 Hz.
D) 20.1 Hz.
E) 14.1 Hz.