Practice question

Given: A 3.5 kg mass falls from 7 m onto a spring ( k = 1200 N/m ). What is the maximum compression? (Take g = 10 m/s² ) These values define the system as per NCERT data. Formula: Potential energy mgh = 3.5 × 10 × 7 = 245 J. This is standard NCERT relation. Substitution & Calculation: Spring energy 1/2 k x_m² = 245 Rightarrow 600 x_m² = 245 Rightarrow x_m = sqrt0.4083 approx 0.639 m . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.