Question

a stone falls from a building and reaches the ground after 2.5 seconds later how high is a building? The value of g is 9.8 M per second square

Answer 1

Given:
g=9.8m/sec²
u=0m/s
t=2.5sec

h = ut +½ gt²
h = 0 × 2.5 + ½ × 9.8 × (2.5)²
h = 0 + 4.9 × 6.25
h = 30.625 m

hope helps you ❤️❤️❤️❤️❤️
love you ❤️
follow me any doubt comments below

Answer 2

$s = ut + \frac{1}{2} a {t}^{2} \\ s = \frac{1}{2} \times 9.8 \times {(2.5)}^{2} \\ s = 30.625m$