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JEE Main 2005
Exam
JEE Main
Year
2005
Subject
Physics
Chapter
Motion in One Dimension

JEE Main 2005 · Physics · Motion in One Dimension

A parachutist after bailing out falls 50 ~m without friction. When...

A parachutist after bailing out falls 50 m50 \mathrm{~m} without friction. When parachute opens, it decelerates at 2 m/s22 \mathrm{~m} / \mathrm{s}^2. He reaches the ground with a speed of 3 m/s3 \mathrm{~m} / \mathrm{s}. At what height, did he bail out?

Options

  1. A91 m91 \mathrm{~m}
  2. B182 m182 \mathrm{~m}
  3. C293 m293 \mathrm{~m}
  4. D111 m111 \mathrm{~m}

Correct answer

C. 293 m293 \mathrm{~m}

Step-by-step solution

s=50+\left(\frac{3^2-(2 \times 10 \times 50)}{2(-2)}\right)=293 m=293 \mathrm{~m}.
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