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A parachutist drops freely from an aerop...

A parachutist drops freely from an aeroplane for 10 s before the parachute opens out. Then he descends with a net retardation of 2.5 ms^-2. If he jumps out of the planem a height of 2495 m and `g=10 ms^-2`, then his velocity on reaching the ground will be

A

`2.5 ms^-1`

B

`7.5 ms^-1`

C

`5 ms^-1`

D

`10 ms^-1`

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TARGET PUBLICATION-Motion in a plane-Exercise
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