Question

A stone falls from a building and reaches the ground 2.5 seconds later . how high is the building ? ( g= 9.8 m/ s2​

Answer 1

Answer:

30.625 m

Explanation:

s=ut+1/2(at^2)

=0+1/2(9.8×2.5^2)

=30.625

Answer 2

ANSWER :

GIVEN :

u = 0

a = 9.8 m/s²

t = 2.5 s

explaination step by step:

second equation of motion is

s= ut +1/2at²

= 0*2.5+1/2(9.8)*(2.5)²

= 0+1/2(9.8*6.25)

= 0+1/2*61.25

ANSWER: 30.625