Practice question

Given: A 1200 kg car moving at 15 m/s compresses a spring ( k = 8 × 10³N/m ). What is the maximum compression? Formula: Initial K = 1/2 × 1200 × 15² = 135000 J. Substitution & Calculation: Spring energy 1/2 k x_m² = 135000 Rightarrow 4000 x_m² = 135000 Rightarrow x_m = √33.75 approx 5.81 m . Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.