# A parachutist bai

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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