Answer :

**Formula to be used:**

..1

..2

..3

Where v = Final Velocity t = Time

u = Initial Velocity s = Distance

a = Acceleration

Two Cases:

(1) Parachutists undergo a freefall for 40 m

(2) Parachutists decelerates at 2 ms^{–2} and reach ground at a speed of 2 ms^{–1}

**Case – 1:**

Here, u = 0; s = ; a = g = Acceleration due to gravity; v = ? ; t = = ?

Now, using equation 3, we get:

..4

Now, this speed becomes the initial speed for case 2.

Also, using equation 1, we get:

..5

**Case – 2:**

Here, u = ; a = –2 ms^{–2}; t = ? ; s = ? ; v = 2 ms^{–1}

Now, using equation 3, we get:

..6

Also, using equation 1:

..7

So, total time taken =

Also, total distance above ground =

= 40 + 195

= 235 m

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