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NEET 2011 (AIPMT, Prelims) · Motion Under Gravity

Motion Under Gravity question from NEET 2011 (AIPMT, Prelims)

Q49NEET 2011 · AIPMT · PRELIMSEasy

Motion Under Gravity

A boy standing at the top of a tower of 20 m height drops a stone. Assuming g = 10 m s−2{}^{-2}, the velocity with which it hits the ground is

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Answer: (b)

  1. Dropped from rest: v=2ghv = \sqrt{2gh}
  2. v=2×10×20=400=20v = \sqrt{2 \times 10 \times 20} = \sqrt{400} = 20 m/s
  3. So the answer is (b) 20.0 m/s.
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