A golf ball is released from rest at the top of a very tall bulding.

Neglecting air resistance , caclulate the position and velocity of the ball after 1 , 2 and 3 s

Given :

v0 = 0

g = -9.81

t 1,2,3

now we use v = v0 + at for each time

v = -9.81 X (1) =-9.81

v = -9.81 X (2) = -19.6

v = -9.81 X (3) = -29.7

now we find Dx ?

Is my step correct ?