Question

A parachutist after bailing out falls 50 m without friction. When parachute opens, it decelerates at 2 ms^-2. He reaches the ground with a speed 3 ms^-1. At which height did he bail out?

• A. 91 m
• B. 182 m
• C. 293 m
• D. 111 m

Answer 1

Answer: (C)

293 m

Answer 2

v² = 2gh = 2 × 10 × 50 d

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