Question

A stone is dropped from a height
of 20 m. At the end of 2 sec of free
fall its speed will be:
A) 9.8 m/s
B) 19.6 m/s
C) 4.9 m/s
D) 29.4 m/s
Terminal velocity of a droplet​

Answer 1

Answer: 19.6m/s

Explanation:v=u + at

As in case of free fall

u=0

Therefore, v = at

a due to gravity = 9.8 m/s

v=at

9.8×2

19.6m/s

Answer 2

Explanation:

Your ans is 19.6m/s

you have to just use the eqn

V = U - gt

And you will get your ans