Velocity of a falling ball from 80m height

Practice question

Question

A ball is dropped from a height of 80m. What is its velocity just before hitting the ground? (Take g\=10m/s2)

Options

Choose one · Correct answer highlighted

30 m/s 40 m/s Correct 50 m/s 20 m/s

Explanation

For free fall, s=½gt² and v²=2gh per NCERT. With g=10 m/s², given height or velocity yields time or distance via these equations. Substituting values gives result matching 40 m/s. This confirms option B as correct by uniformly accelerated motion equations.

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