Question

a stone is dropped from the top of a tower of height 20m and freely falls under gravity. What is the velocity?​

Answer 1

See the image for answer.

Answer 2

Step-by-step explanation:

Height of tower = 20 m

$v {}^{2} = \: u {}^{2} \: + 2gh$

v2 = 2gh ( as u = 0 because it is dropped )

v2 = 2 x 9.8 x 20

v2 = 196

v = 14 m/ s