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

Question

A stone falls from a building and reaches the ground 2.5 seconds later. How high is the building? (g = 9.8 m/s 2 )

Philoid · Accepted Answer

Initial velocity, u=0m/s

Acceleration due to gravity, g=9.8m/s²

Time taken to reach the ground, t=2.5 sec

Height, h =?

Using relation, s = ut + gt²

s = 0 * 2.5 + * 9.8 * 2.5 * 2.5

s = 0 + 4.9 * 2.5 * 2.5

s = 30.625m

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