Question

A stone is dropped from the roof of the building takes 4 sec to reach ground calculate the height of the building​

Answer 1

Answer:

check the attachment........

Answer 2

Answer:

u=0

g=9.8m/s^2

v=?

t=4s

By using Newton's Second Law of gravitation, we get, -:

h=ut+1/2gt^2

=0×4+1/2×9.8×4×4

=0+1/2×9.8×16

=0+1×9.8×8

=0+78.4

=78.4m