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A parachutist after bailing out falls 52...

A parachutist after bailing out falls 52 m without friction. When the parachute opens, she decelerates at `2.1 ms^(-2)` & reaches the ground with a speed of `2.9 ms^(-1)`.
(i) How long has been the parachutist in the air? (ii) At what height did the fall begin?

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