Practice question

Given: A 7 kg object moves with a velocity of 3 i - 4 j m/s . What is the magnitude of the velocity of its nter of mass? These values define the system as per NCERT data. Formula: Magnitude = sqrt(3)² + (-4)² = sqrt9 + 16 = sqrt25 = 5 m/s .. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: For a single object, the nter of mass velocity equals the object’s velocity. 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.