Practice question

Given: A spring of k = 250 N/m has a 2.5 kg mass. If E = 1.25 J, what is the amplitude? Formula: Total energy: E = 1/2 k A². Substitution & Calculation: 1.25 = 0.5 × 250 × A² Rightarrow 1.25 = 125 A² Rightarrow A² = 0.01 Rightarrow A = 0.1 m . Final Result: The computed value matches expected outcome and confirms correct choice as per latest NCERT 2026-27.