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Question

A 5kg block slides down a frictionless incline from 9m height. What is its speed at the bottom? (Take g\=10m/s2)

Options

Choose one · Correct answer highlighted

Explanation

Potential energy mgh=5×10×9=450J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 13 m/s. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.

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