Practice question

Given: A spring-mass system has m = 1 kg, k = 400 N/m . What is its frequency? These values define the system as per NCERT data. Formula: Angular frequency: omega = sqrtk/m = sqrt400/1 = 20 rad/s. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Frequency: v = omega/2π = 20/2 × 3.14 approx 3.18 Hz . Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.