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Question

A 3kg object is dropped from 17m. What is its speed just before hitting the ground? (Take g\=10m/s2)

Options

Choose one · Correct answer highlighted

Explanation

Potential energy V=mgh=3×10×17=510J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 18 m/s. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.