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August 22, 2014

August 22, 2014

Posted by **ted** on Wednesday, November 24, 2010 at 4:50pm.

A. After 10secs how far have the divers fallen?

B. They open their chutes at an altitude of 1000metres. how long did they free-fall?

C. If a parachute does noe open at 1000metres,how much time is left to use the emergency chute?

For (a),I got H=5000 and (b), I got t=30secs

BUT i do not know how to get the answer for QUESTION (C).

PLS HELP ME ,HAVE TRIED IT BUT I DIDN'T GET IT.

- math -
**Reiny**, Wednesday, November 24, 2010 at 5:43pmFind out how long it would take to fall the entire 5500 m

so

0 = 5500 - 5t^2

t^2 = 1100

t = 33.167 sec

but he has already fallen for 30 sec , so he has

3.167 sec left

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