Answer:
The distance that it fell is [tex]396.9\rm metre[/tex]
Explanation:
Given information:
Height of the building = [tex]h \rm metre[/tex]
Time=[tex]0.9\rm sec[/tex]
acceleration due to gravity [tex]a=g=9.8\rm m/s^2[/tex]
Taken as positive because the speed is increasing downward
By using, equation of motion,
[tex]h=ut+\frac{1}{2}at^2=0\times t+\frac{1}{2}gt^2[/tex]
[tex]h=\frac{1}{2}9.8\rm m/s^2\times (9s)^2=396.9metre[/tex]
The distance that it fell is [tex]396.9\rm metre[/tex]
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