Question

a stone falls from a building and reaches the ground 2.5 second later. how high is the building? G is equal to 9.8 metre per second square

Answer 1

Given : u =0, t=2.5s , g = 9.8m/s^2 , H (height of building) = ?

Solution:
Using. H = ut +1/2gt^2
=> H = 0 x 2.5 + 1/2 x 9.8 x 2.5 x 2.5
=> H = 0 + 30.625
=> H = 30.625 m.

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