Practice question
Question
A car of mass 1500kg moving at 20m/s collides with a spring of constant 104N/m. What is the maximum compression?
Explanation
Initial K=12×1500×202=300000J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 7 m. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
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