1.5kg Object Dropped 16m: Speed Before Impact

Practice question

Question

A 1.5kg object is dropped from 16m. What is its speed just before hitting the ground? (Take g\=10m/s2)

Options

Choose one · Correct answer highlighted

17 m/s Correct 13.6 m/s 20.4 m/s 19 m/s

Explanation

Potential energy V=mgh=1.5×10×16=240J. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 17 m/s. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.

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