Practice question

Given: A stone is dropped from rest. What is the distance covered in the 5th second of its fall? (Take g = 10 m/s² ) These values define the system as per NCERT data. Formula: Distance in n -th second = g · 2n - 1/2. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: For 5th second, n = 5 . Substitute: d = 10 · 2 · 5 - 1/2 = 10 · 9/2 = 45 m . The distance covered is 45 m . 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.