Question

How to solve this question?​

Answer 1

Answer:

options 3

Explanation:

20 m/s is a right answer

Answer 2

Answer:

The correct option is 4) Zero

Explanation:

$vi\: (parachutist) = 0 \\ v = n + gt \\ = 0 + ( - 10)(20) = - 200ms \\ s = nt + \frac{1}{2} {nt}^{2} \\ = 0 + \frac{1}{2} \: ( - 10) \times 400 \\ = s = 2000 \\ h = 2500 - 2000 \\ = 500 \\ {v}^{2} = {u}^{2} + 2ah \\ = 40000 - (2 \times 40 \times 500) \\ = 0 \\ Therefore \: v = 0ms$