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A parachutist after bailing out falls 50...

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

A

293m

B

111m

C

91m

D

182m

Text Solution

Verified by Experts

The correct Answer is:
A

At B,
`v_B^2 = u^2 + 2as`
` = 2 xx 9.8 xx 50 = 980`
At C,
` rArr (3)^2 = 980 + 2 xx (-2) xx h`
rArr h = 971/4 = 242.7 = 243`
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