Practice question
Question
A 7kg mass falls from 3m onto a spring (k\=2000N/m). What is the maximum compression? (Take g\=10m/s2)
Explanation
Potential energy mgh=7×10×3=210J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 210 J. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.
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