Question

15. A parachutist after mailing out falls
150m without seeiction when parachute
oppens it decelerates at amis de beaches
ground with smis. At whath, he fell down​

Answer 1

Explanation:

Let The Height Be "s" m.

Distance Covered Without Parachute = 50m

Initial Velocity = 0

Acceleration = 9.8 m/$sec^{2}$

$v^{2}$= $u^{2}$+2as

$v^{2}$= 2 x 9.8 x 50 = 980

$v^{2}$= 980

v = $\sqrt{980}$= 14 x $\sqrt{5}$ m/sec

Now Remaining Distance = s-50

Initial Velocity = 14 x $\sqrt{5}$m/sec

Acceleration = -2 m/$sec^{2}$

$v^{2}$= $u^{2}$+2as

$3^{2}$ = 980-4(s-50)

9 = 980-4s+200

9 = 1180-4s

4s = 1171

s = 292.75 m

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