question_answer

A parachutist after bailing out falls 50 m without friction. When parachute opens, it decelerates at\[2m/{{s}^{2}}\]. He peaches the ground with a speed of 3 m/s. At what height, did he bail out?     AIEEE  Solved  Paper-2005

A) 91 m                     

B)        182 m

C) 293 m                   

D)        111 m

Correct Answer: C

Solution :

Parachute bails out at height H from ground velocity at A The velocity at ground         (given) Acceleration       (given)   \[H=242.75+h=242.75+50\approx 293\,m\]