Question

A ball is dropped from the top of a building. It takes 15 seconds to reach the ground. Find the height of the building. (Tale g = 10 m/s2.)
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Answer 1

Let s=distance or height in metres

u=initial velocity in metres per seconds

g=acceleration due to gravity in metres per seconds per second

t=time in seconds

s = ut + 0.5gt^2

= 0(10) + 0.5(15)(10)^2

= 0 + 750

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