Practice question

Given: A torque of 15 Nm is applied to a disk with moment of inertia 5 kg m² . What is its angular acceleration? These values define the system as per NCERT data. Formula: tau = I α. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: tau = 15 Nm, I = 5 kg m² . α = tau/I = 15/5 = 3 rad/s² . 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.