A ball dropped from 9th floor of a multistoried building reaches the ground in 3 seconds in the first second of its free fall it passes through 'n'floors then find the value of n
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n = 1
Explanation:
A ball dropped from 9th floor of a multistoried building reaches the ground in 3 seconds in the first second of its free fall it passes through 'n'floors then find the value of n
Ball is dropped => initial Velocity = 0
a = g ( acceleration due to gravity)
t = 3 sec
S = 9h ( h is a floor height)
S = ut + (1/2)at²
=> 9h = (1/2)g(3)²
=> h = g/2
Distance covered in 1st sec
= (1/2)g(1)²
= g/2
= h
height of n floors = nh
=> nh = h
=> n = 1
it passes through 1 floor
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