Considering massless rigid rod small oscillations, the natural

Considering massless rigid rod small oscillations, the natural frequency (in rad/s) of vibration of the system shown in the figure is

Form ⇒ dx = 2rθ

	d²x	= 2r θ̇̇
	dt²

Taking moments 2r θ.m. 2r.θ̇̇ + 400 × (rθ) × rθ = 0
⇒ 4m.θ̇̇ + 400 × θ = 0

√	400
	1

√	400
	2

√	400
	3

√	400
	4