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JEE Main2005PhysicsMotion in One DimensionActual

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

Options

  1. A91 ~m
  2. B182 ~m
  3. C293 ~m
  4. D111 ~m

Correct answer

C. 293 ~m

Step-by-step solution

s=50+ ( 3^2-(2 10 50) 2(-2) )=293 ~m .

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